Who would win in a fight between Raiku and Onix?

This is a fun matchup, but ultimately, Raikou would likely win in a fight against Onix. Here's why:

* Speed Advantage: Raikou is incredibly fast. It's a legendary Electric-type, known for its incredible speed and agility. Onix, on the other hand, is slow and bulky, making it difficult to land attacks on Raikou.

* Type Advantage: Raiku is an Electric-type, which has a type advantage over Rock-type Onix. Electric attacks are super effective against Rock, meaning they deal double damage.

* Powerful Moves: Raikou can learn powerful Electric-type moves like Thunder, Thunder Bolt, and Wild Charge, which would devastate Onix. Onix, while strong defensively, doesn't have a lot of powerful offensive options.

* Weaknesses: Onix is weak to Water, Fighting, Ground, Steel, and Grass-type attacks. Raikou can potentially exploit these weaknesses, especially if it learns a Water-type move.

While Onix's high defense could potentially make it a tough opponent, Raikou's speed, type advantage, and strong moves make it the more likely victor in a fight.

However, there's always a chance for an upset! If Onix manages to land a powerful Rock-type attack on Raikou, it might be able to turn the tide. It all depends on the specific moves, strategies, and luck involved in the battle.