Here's Bowser Jr and his gang, Petey Piranha, Koopa Bros and King Lakitu who was reborn by Nightmare Enterprises.
Also, I put Mario Heroes, who was pissed at the gang who was working for King Bowser to find the Crystal Stars before Mario Bros find them. But they are not strong to defeat Mario Bros. XD
Characters (c) Nintendo, HAL Laboratory and Warpstar INC
Maple (c) BrawlFan1
Super Mario Bros GT The Grand Adventure aka SMBGT TGA (c) Me ~xXKaijuKing91Xx