Using TMs, they can be found in dungeons or as a reward with wonder mail.
An example of wonder mail that will reward you a TM (Protect) is:
??-Y SM+? ?F?M
1??8 +47T 8??W
Yes, the moves you already know stay with you even when you evolve.
Bulbasaur can learn any move he can learn in Pokemon leafgreen/ firered.
You probably have all of his moves turned off or he's prone blocked.
When you have no more moves left just have a move selected and then press L + A to use Struggle.
You have to use a Ginseng, it will randomely boost whichever move is currently selected by the leader. Not for partners. If you want a partner to have a move that is boosted you will have to make that partner the leader first. ALSO you can only use the item in a dungeon!
electic type moves
set the move uwant (the one u wan plus 1) and let eat ingest a ginseng
oioipo
because you swithed all of his moves off!(they count as stars) it may also be you ran out of pp for his moves dumbo!
It depends on what moves you teach it and the dungeons that you face.
When you set a move and press L+A you use the move.
It depends who you are and what moves you know