Okay,
Heat Wave - Its a keeper and one of my Favorite moves in these games
Flamethrower - Also an easy keeper, you need a base range attack
Focus Blast - Accuracy really doesn't count in these games, making this move beastly.
Dragon Pulse - All Special Zard is more deadly than mixed in most cases, even in these games.
Note: This is NOT for games like Diamond Pearl Platinum Black White etc.