To put the Animations in either Mariodk's Pit or Captain Falcon Moveset just follow these instructions:

Step 1: Open BrawlBox v0.65 in Open the Goku model you have.

Step 2: Right Click the model and click "Preview".

Step 3: In BrawlBox view the model and Load either FitCaptainMotionEtc.pac or FitPitMotionEtc.pac (which ever one you desire to use)

Step 4: Scroll down through the animations and replace the old ones with the new ones:

Ex: FuraFura-replace with FuraFura

It's easy to do but if you have problems PM me. This is only Version 1, I'll update and make more Burst Limit style animations soon and ploish up some that I made.
Broly is a WIP (Work In Progress) but he'll have the epicness The God of Destruction should have. Anyway enjoy!!