Why are these moves incompatible on Blastoise on Pokemon Showdown?

Question

I was trying to add a Mega-Blastoise to my team when this message popped up:

Your team was rejected for the following reasons:
- Blastoise-Mega's moves Aqua Jet, Aqua Ring, Aura Sphere, Avalanche are incompatible.

How do I know which moves need to be replaced and can't I just use these moves?
Please help!

Comments

You could use trial and error with the 'Validate' button in the teambuilder.

Answer 1

Blastoise can learn avalanche only from a TM in Generation 4, and it can know aura sphere only if it was bred in generations 6 or 7. Pokemon bred in newer generations can't be transferred to Generation 4, so Blastoise can't know both aura sphere and avalanche.