Move Animation Changes
Since the 1996 release of Pokemon Yellow, various moves have had a change in animation. This change was done to lower the flashing animation that can possibly trigger photo-sensitive epilepsy in some players.
There are now fifteen moves that have different animation than in the original Pokemon Yellow:
1) Blizzard
2) Bubble Beam
3) Confusion
4) Dream Eater
5) Explosion
6) Guillotine
7) Hyper Beam
8) Mega Kick
9) Mega Punch
10) Psychic
11) Reflect
12) Rock Slide
13) Self-Destruct
14) Spore
15) Thunderbolt
As you can tell in the picture above, there is a great change in the virtual effects shown.