Why doesn't my traded Chatot know Chatter?

Question

I did an in-game trade in Platinum for a Buizel in Eterna City.

Comments

What level is your Chatot? The moves known by Pokemon from in-game trades are determined by the Pokemon's level, if I recall.

Answer 1

Chatot learns chatter at level 21, and it learns 4 more moves at level 37. In-game trades come at the same level as the Pokemon you're trading. So it won't come knowing chatter if you trade a Buizel that's below level 21 or above level 36.
source

Comments

Thank you, I thought it was base movest instead of it learning it at 21