Here are some unused animation values. They either have the "Invalid Chop" or the "Invalid Hiroshi Hase Taunt". There might be more, but I haven't looked thoroughly. Most of them are consecutive, so it could be easier when trying to import animations into the game.
"Invalid Chop"
240A
240B
2420
2421
2568
2569
256A
256B
267E
267F
2680
2681
2720
2721
28CF
28D0
3003
3007
300B
300F
3013
3017
301B
3023
3027
302B
3104
3105
3106
3118
3119
311A
"Invalid Hiroshi Hase Taunt"
28F4
28F5
28F6
28F7
2905
2906
2907
2908
290A
290B
290E
290F
2920
2921
2922
2923
292D
292E
293D
293E
293F
2940
294F
2950
2959
295A
295B
295C
2963
2964
2965
2966
2976
2977
2978
2979
299B
299C
299D
299E
29A5
29A6
30FE
30FF
3100
3101
3102
3103
3115
3116
3117
311B
311C
311D
Seems like these values are linked to unused master mod values. I've also found that I can give the moves names too.
Master Move Mod Value
139C
Animation Values
30FE
30FF
3100
Master Move Mod Value
13BA
Animation Values
3101
3102
3103
Master Move Mod Value
13CE
Animation Values
3104
3105
3106
Master Move Mod Value
13F6
Animation Values
3115
3116
3117
Master Move Mod Value
1400
Animation Values
3118
3119
311A
Master Move Mod Value
140A
Animation Values
311B
311C
311D