diff --git a/keyboards/ungodly/nines/keyboard.json b/keyboards/ungodly/nines/keyboard.json
index ee4c65f9bb7..a92711c5c33 100644
--- a/keyboards/ungodly/nines/keyboard.json
+++ b/keyboards/ungodly/nines/keyboard.json
@@ -14,8 +14,7 @@
       {"pin_a": "E6", "pin_b": "B4", "resolution": 2}
     ]
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "features": {
     "bootmagic": true,
     "encoder": true,
diff --git a/keyboards/unikeyboard/diverge3/keyboard.json b/keyboards/unikeyboard/diverge3/keyboard.json
index 53c5f55fcdb..187e5dead06 100644
--- a/keyboards/unikeyboard/diverge3/keyboard.json
+++ b/keyboards/unikeyboard/diverge3/keyboard.json
@@ -37,8 +37,7 @@
       "pin": "D0"
     }
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/unikeyboard/divergetm2/keyboard.json b/keyboards/unikeyboard/divergetm2/keyboard.json
index 3dc19772fa7..c0c0f15c0ca 100644
--- a/keyboards/unikeyboard/divergetm2/keyboard.json
+++ b/keyboards/unikeyboard/divergetm2/keyboard.json
@@ -31,8 +31,7 @@
             "pin": "D0"
         }
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layout_aliases": {
         "LAYOUT_ortho_4x12_2x2u": "LAYOUT"
     },
diff --git a/keyboards/unikeyboard/felix/keyboard.json b/keyboards/unikeyboard/felix/keyboard.json
index 232c5f80f17..612bccd1964 100644
--- a/keyboards/unikeyboard/felix/keyboard.json
+++ b/keyboards/unikeyboard/felix/keyboard.json
@@ -29,8 +29,7 @@
     "pin": "C6",
     "levels": 5
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "community_layouts": ["ortho_5x4"],
   "layout_aliases": {
     "LAYOUT": "LAYOUT_ortho_5x4"
diff --git a/keyboards/uzu42/rev1/keyboard.json b/keyboards/uzu42/rev1/keyboard.json
index 6f4f080e679..3b152c7b59b 100644
--- a/keyboards/uzu42/rev1/keyboard.json
+++ b/keyboards/uzu42/rev1/keyboard.json
@@ -45,8 +45,7 @@
       "twinkle": true
     }
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/vagrant_10/keyboard.json b/keyboards/vagrant_10/keyboard.json
index 4bf29fba119..d59095c2d72 100644
--- a/keyboards/vagrant_10/keyboard.json
+++ b/keyboards/vagrant_10/keyboard.json
@@ -25,8 +25,7 @@
     "rows": ["F7", "B1", "B3", "B2"]
   },
   "diode_direction": "COL2ROW",
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/wsk/alpha9/keyboard.json b/keyboards/wsk/alpha9/keyboard.json
index acdc1be3073..ff9e26b0d28 100644
--- a/keyboards/wsk/alpha9/keyboard.json
+++ b/keyboards/wsk/alpha9/keyboard.json
@@ -49,8 +49,7 @@
   "ws2812": {
     "pin": "F4"
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/wsk/g4m3ralpha/keyboard.json b/keyboards/wsk/g4m3ralpha/keyboard.json
index 4f88fd0ce11..f008a77a26e 100644
--- a/keyboards/wsk/g4m3ralpha/keyboard.json
+++ b/keyboards/wsk/g4m3ralpha/keyboard.json
@@ -50,8 +50,7 @@
     "rows": ["D4", "B4", "B5", "D1"]
   },
   "diode_direction": "COL2ROW",
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/wsk/jerkin/keyboard.json b/keyboards/wsk/jerkin/keyboard.json
index 3fc05080b05..4ff9701f6eb 100644
--- a/keyboards/wsk/jerkin/keyboard.json
+++ b/keyboards/wsk/jerkin/keyboard.json
@@ -25,8 +25,7 @@
         "rows": ["B3", "B4", "B5"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/wsk/kodachi50/keyboard.json b/keyboards/wsk/kodachi50/keyboard.json
index c93952d808f..d37eb965e22 100644
--- a/keyboards/wsk/kodachi50/keyboard.json
+++ b/keyboards/wsk/kodachi50/keyboard.json
@@ -46,8 +46,7 @@
         "rows": ["D2", "B5", "B6", "B2", "B3", "B1", "F7", "F6"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/wsk/pain27/keyboard.json b/keyboards/wsk/pain27/keyboard.json
index af882a112e4..43a9ce5f592 100644
--- a/keyboards/wsk/pain27/keyboard.json
+++ b/keyboards/wsk/pain27/keyboard.json
@@ -46,8 +46,7 @@
         "rows": ["F4", "F5", "D0"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/xenon/keyboard.json b/keyboards/xenon/keyboard.json
index 0229f73ebd2..72d2a5b0d82 100644
--- a/keyboards/xenon/keyboard.json
+++ b/keyboards/xenon/keyboard.json
@@ -39,8 +39,7 @@
       "pin": "D2"
     }
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/yampad/keyboard.json b/keyboards/yampad/keyboard.json
index 789565e342f..becdc2204db 100644
--- a/keyboards/yampad/keyboard.json
+++ b/keyboards/yampad/keyboard.json
@@ -40,8 +40,7 @@
         "rows": ["C6", "D7", "E6", "B4", "B5"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "debounce": 2,
     "layouts": {
         "LAYOUT": {
diff --git a/keyboards/yeehaw/keyboard.json b/keyboards/yeehaw/keyboard.json
index 0f10738685f..86db217fe15 100644
--- a/keyboards/yeehaw/keyboard.json
+++ b/keyboards/yeehaw/keyboard.json
@@ -34,8 +34,7 @@
   "ws2812": {
     "pin": "B2"
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "features": {
     "bootmagic": false,
     "encoder": true,
diff --git a/keyboards/yosino58/rev1/keyboard.json b/keyboards/yosino58/rev1/keyboard.json
index ffc1a5d8271..939a11c49d4 100644
--- a/keyboards/yosino58/rev1/keyboard.json
+++ b/keyboards/yosino58/rev1/keyboard.json
@@ -25,8 +25,7 @@
     "ws2812": {
         "pin": "D3"
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/yushakobo/navpad/10/info.json b/keyboards/yushakobo/navpad/10/info.json
index e28a2e2cb17..355cec23479 100644
--- a/keyboards/yushakobo/navpad/10/info.json
+++ b/keyboards/yushakobo/navpad/10/info.json
@@ -37,6 +37,5 @@
             "rgb_test": true
         }
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina"
+    "development_board": "promicro"
 }
diff --git a/keyboards/yushakobo/navpad/10_helix_r/keyboard.json b/keyboards/yushakobo/navpad/10_helix_r/keyboard.json
index 89613390c1d..89004dd0d35 100644
--- a/keyboards/yushakobo/navpad/10_helix_r/keyboard.json
+++ b/keyboards/yushakobo/navpad/10_helix_r/keyboard.json
@@ -63,8 +63,7 @@
             "rgb_test": true
         }
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/yushakobo/quick17/keyboard.json b/keyboards/yushakobo/quick17/keyboard.json
index aa0d39756d9..627642a1796 100644
--- a/keyboards/yushakobo/quick17/keyboard.json
+++ b/keyboards/yushakobo/quick17/keyboard.json
@@ -51,8 +51,7 @@
     "ws2812": {
         "pin": "D2"
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/yushakobo/quick7/keyboard.json b/keyboards/yushakobo/quick7/keyboard.json
index 146397d0882..4bd42a2f161 100644
--- a/keyboards/yushakobo/quick7/keyboard.json
+++ b/keyboards/yushakobo/quick7/keyboard.json
@@ -28,8 +28,7 @@
     "ws2812": {
         "pin": "D3"
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "features": {
         "bootmagic": true,
         "command": true,
diff --git a/keyboards/yynmt/dozen0/keyboard.json b/keyboards/yynmt/dozen0/keyboard.json
index f627152d0e1..84b62cce5cc 100644
--- a/keyboards/yynmt/dozen0/keyboard.json
+++ b/keyboards/yynmt/dozen0/keyboard.json
@@ -46,8 +46,7 @@
     "rows": ["F4"]
   },
   "diode_direction": "COL2ROW",
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/zigotica/z12/keyboard.json b/keyboards/zigotica/z12/keyboard.json
index 8d797907de7..9af7b86eb0b 100644
--- a/keyboards/zigotica/z12/keyboard.json
+++ b/keyboards/zigotica/z12/keyboard.json
@@ -14,8 +14,7 @@
             {"pin_a": "B6", "pin_b": "B2"}
         ]
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "build": {
         "lto": true
     },
diff --git a/keyboards/zigotica/z34/keyboard.json b/keyboards/zigotica/z34/keyboard.json
index 0a96fa00916..c5d2cc8ae92 100644
--- a/keyboards/zigotica/z34/keyboard.json
+++ b/keyboards/zigotica/z34/keyboard.json
@@ -20,8 +20,7 @@
             "resync": true
         }
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "matrix_pins": {
         "direct": [
             ["C6", "F7", "F6", "F5", "F4"],