the level up moves are;
lv. :move:
1. l leer
1. l peck
7. l focus energy
9. l double kick
13. l poison sting
20. l furry attack
23. l horn attack
28. l helping hand
35. l toxic spickes
38. l flatten
43. l poison jab
50. l captivate
58. l horn drill
hope this helped, i got this from the new Pokemon HeartGold and SoulSilver Pokedex, it has alot of hints and tips that are very useful.
He can learn many but he can learn moves like giga impact and hyper beam when he evolves. So if you want good moves evolve him!
Because a level 100 Pokemon can no longer level up, it cannot learn new moves in that way. However, move tutors can teach a Pokemon new moves regardless of level, as can TMs and HMs. In Diamond, Pearl, and Platinum, there is also a man who will teach your Pokemon moves it could have learned at earlier levels in exchange for a Heart Scale.
serebii.net
Marshadow can learn a variety of moves through leveling up, including Shadow Sneak at level 1, which is a priority Ghost-type move. As it levels up, it also gains access to moves like Force Palm at level 20 and Spectral Thief at level 30. Its final leveling move is Drain Punch, learned at level 40. These moves contribute to Marshadow's unique playstyle, emphasizing its Ghost/Fighting typing.
No.
Level 13
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Cyndiquil can learn the same moves as Quilava and Typhlosion, just at lower levels.
Mew learns a move every 10 levels.
Goldeen/Seaking, Nidoran/Nidorino, Nidoran/Nidorina and Rhyhorn/Rhydon learn it.
search serebii.net
Focus punch and psychic
No, it can't. Only its last evolutionform, Nidoqueen, can learn surf.
Use Tms so it can learn moves at any level
Level 12
From my opinion, any form of nidoran is better than gastly. Nidoran has more physical moves like poison jab. Koffing has smokescreen or something similar.
only at certain levels.