Syntax Highlighted Code: ASM
SonAni_Whistle: dc.b $FD,$E5,$E6,$E7,$FF,$FF ;**
I don't think using $FD for the frame duration is going to give good results, it's specific to the pushing animation. The first byte in an animation script is the number of frames (minus 1) that each image will be displayed. 0 would change every frame, 1 would change every other frame, etc.