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Oh, last night I trained up a Shroomish to use as a Pokemon capturer, and along the way I bred it with my Floette to see if it could learn Spore, Worry Seed, or Growth as egg moves. Turns out it can't (WHO WOULD'VE THOUGHT)
Shroomish seems to have the exact same level up movepool as Gen 5:
Start - Absorb
5 - Tackle
9 - Stun Spore
13 - Leech Seed
17 - Mega Drain
21 - Headbutt
25 - Poison Powder
29 - Worry Seed
33 - Growth
37 - Giga Drain
41 - Seed Bomb
45 - Spore
EDIT: I let it evolve at lvl 51 because it wasn't...
That was actually changed in Gen 5. If you wanted a Swords Dance Shedinja in the B/W games, the only way to get it was to transfer one over from a Gen 4 game
just did some more breeding and Flabébé also doesn't learn: Helping Hand, Entrainment, Heal Pulse, Simple Beam, Encore, Follow Me, Moonlight, Gravity, Healing Wish, Minimize, Sweet Kiss, or Bestow
SOOOOOOO
just an update, Misty Terrain makes Nature Power turn into Moonblast. I have no idea what learns Electric Terrain but it should be pretty easy to test if someone has a Pokemon who learns it
In gen 5, yes, a Pokemon with Simple would say "X's Attack harshly fell/rose"
I can confirm that Intimidate didn't change, there were a couple Pokemon with Intimidate I encountered just now in Looker's sidequest
So, Nature Power is affected by moves like Grassy Terrain. In a wild battle in a cave, where Nature Power normally turns into Power Gem, after Grassy Terrain was used it turned into Energy Ball instead. I don't have anything with the moves on me right now, but I'm guessing Nature Power is also...
I just bred an Audino with Heal Pulse/Entrainment/Simple Beam/Helping Hand and a Clefairy, and the egg hatched with Heal Pulse.
So it seems like that's an egg move for the Clefairy line now
EDIT: Level up stuff up to 50 so far for Clefairy (it evolved from Cleffa at lvl 16 so I don't know...
just did some experimenting and i can say that flabébé doesn't learn: Stun Spore, Sleep Powder, Synthesis, Leaf Storm, or Weather Ball through breeding
Roserade learns Venom Drench, Grassy Terrain, Weather Ball, Poison Sting, Mega Drain, Magical Leaf, and Sweet Scent at level 1 (or by the Move Relearner). Venom Drench and Grassy Terrain are the only additions from gen 5
i was using barbaracle as an hm slave, i remember it wanting to learn shell smash and possibly stone edge at higher levels, you wouldnt have gotten the prompt if you already had those moves from the relearner i guess