Extension Pack is a huge collection of custom game objects for SMBX2. It includes objects from other games (such as SMB1-3, SMW, YI and etc) and original ones as well.
SMB1:
SMB2:
SMB3:
SMW:
Misc:
- Broozer
- Broozer (Old)
- YI's Arrow Lift
- Giant Chain Chomp
- Whomp
Original: