Video Game Logic

[King Aquamentus]

Here's one of my favorites: Chrono Trigger. When you first battle Magus in his castle, near the end of the battle he uses the spell Dark Matter. Later in the game, Magus can optionally join your group, but DOES NOT have this spell yet! So how the blazing frack was he able to cast it before!? That is more VGL that makes no sense.

Explained in-game. Remember when Magus (fruitlessly) attacked Lavos in the Ocean Palace? Lavos drains his power here. Magus even says so. Leveling him up is a road to recovery.