diff --git a/keyboards/mt/mt84/config.h b/keyboards/mt/mt84/config.h
index 9b115d527d..4a6ed1492e 100644
--- a/keyboards/mt/mt84/config.h
+++ b/keyboards/mt/mt84/config.h
@@ -1,18 +1,6 @@
- /* Copyright 2020  MT <704340378@qq.com>
-  *
-  * This program is free software: you can redistribute it and/or modify
-  * it under the terms of the GNU General Public License as published by
-  * the Free Software Foundation, either version 2 of the License, or
-  * (at your option) any later version.
-  *
-  * This program is distributed in the hope that it will be useful,
-  * but WITHOUT ANY WARRANTY; without even the implied warranty of
-  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  * GNU General Public License for more details.
-  *
-  * You should have received a copy of the GNU General Public License
-  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-  */
+// Copyright 2020 MaiKong<704340378@qq.com>
+// SPDX-License-Identifier: GPL-2.0+
+ 
 #pragma once
 
 #define IS31FL3737_I2C_ADDRESS_1 IS31FL3737_I2C_ADDRESS_GND
diff --git a/keyboards/mt/mt84/keyboard.json b/keyboards/mt/mt84/keyboard.json
index 8833f77ed9..a76336e7ed 100644
--- a/keyboards/mt/mt84/keyboard.json
+++ b/keyboards/mt/mt84/keyboard.json
@@ -43,7 +43,6 @@
             "hue_wave": true,
             "pixel_rain": true,
             "pixel_flow": true,
-            "pixel_fractal": true,
             "solid_reactive_simple": true,
             "solid_reactive": true,
             "solid_reactive_wide": true,
diff --git a/keyboards/mt/mt84/keymaps/default/keymap.c b/keyboards/mt/mt84/keymaps/default/keymap.c
index e3c7fa8b87..2b3371257c 100644
--- a/keyboards/mt/mt84/keymaps/default/keymap.c
+++ b/keyboards/mt/mt84/keymaps/default/keymap.c
@@ -1,18 +1,6 @@
- /* Copyright 2020 mt<704340378@qq.com>
-  *
-  * This program is free software: you can redistribute it and/or modify
-  * it under the terms of the GNU General Public License as published by
-  * the Free Software Foundation, either version 2 of the License, or
-  * (at your option) any later version.
-  *
-  * This program is distributed in the hope that it will be useful,
-  * but WITHOUT ANY WARRANTY; without even the implied warranty of
-  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  * GNU General Public License for more details.
-  *
-  * You should have received a copy of the GNU General Public License
-  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-  */
+// Copyright 2020 MaiKong<704340378@qq.com>
+// SPDX-License-Identifier: GPL-2.0
+
 #include QMK_KEYBOARD_H
 
 
diff --git a/keyboards/mt/mt84/keymaps/via/keymap.c b/keyboards/mt/mt84/keymaps/via/keymap.c
index 6906ddf9fe..906ed635ad 100644
--- a/keyboards/mt/mt84/keymaps/via/keymap.c
+++ b/keyboards/mt/mt84/keymaps/via/keymap.c
@@ -1,18 +1,6 @@
- /* Copyright 2020 MaiKong<704340378@qq.com>
-  * 
-  * This program is free software: you can redistribute it and/or modify 
-  * it under the terms of the GNU General Public License as published by 
-  * the Free Software Foundation, either version 2 of the License, or 
-  * (at your option) any later version. 
-  * 
-  * This program is distributed in the hope that it will be useful, 
-  * but WITHOUT ANY WARRANTY; without even the implied warranty of 
-  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
-  * GNU General Public License for more details. 
-  * 
-  * You should have received a copy of the GNU General Public License 
-  * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
-  */
+// Copyright 2020 MaiKong<704340378@qq.com>
+// SPDX-License-Identifier: GPL-2.0+
+
 #include QMK_KEYBOARD_H
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
diff --git a/keyboards/mt/mt84/mt84.c b/keyboards/mt/mt84/mt84.c
index 276c92fc06..f7e1503cea 100644
--- a/keyboards/mt/mt84/mt84.c
+++ b/keyboards/mt/mt84/mt84.c
@@ -1,18 +1,6 @@
- /* Copyright 2020 MT<704340378@qq.com>
-  *
-  * This program is free software: you can redistribute it and/or modify
-  * it under the terms of the GNU General Public License as published by
-  * the Free Software Foundation, either version 2 of the License, or
-  * (at your option) any later version.
-  *
-  * This program is distributed in the hope that it will be useful,
-  * but WITHOUT ANY WARRANTY; without even the implied warranty of
-  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  * GNU General Public License for more details.
-  *
-  * You should have received a copy of the GNU General Public License
-  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-  */
+// Copyright 2020 MaiKong<704340378@qq.com>
+// SPDX-License-Identifier: GPL-2.0+
+
 #include "quantum.h"
 
 #ifdef RGB_MATRIX_ENABLE