That depends on which version you're playing.
In Heart Gold/Soul Silver, Diamond/Pearl it's at level 13,
Ruby/Sapphire/Emerald
And in Platinum, Black/White it's level 9
I hope it helped ^-^
HOOTHOOT learns Peck, uproar, hypnosis and reflect and then at level 20 he /she evolves into Noctowl
No.
Piplup will learn peck in Pokemon in level 15 of Mystery Dungeon Explorers of Darkness. Peck is when the foe is jabbed with a sharply pointed horn or beak.
pidgeot does not learn aerial ace but it does learn air slash on level 62
Both! Noctowl appear in the grass and Hoothoot appear by headbutt.
HOOTHOOT learns Peck, uproar, hypnosis and reflect and then at level 20 he /she evolves into Noctowl
Hoothoot cannot learn gust.
In Pokémon Platinum, the moves that Hoothoot can learn via level up include ones such as Foresight, Confusion, Growl, Tackle, Peck, Hypnosis, Take Down, Reflect, Zen Headbutt, Air Slash, Roost, Extrasensory, Psycho Shift and Dream Eater.
No.
It'll learn Drill Peck at level 47.
It should learn Drill Peck at around level 58.
no
Piplup learns Peck at level 15
http://www.serebii.net/pokedex/163.shtml
piplup will learn peck at lvl 15
Level 52: Drill Peck
flying, and fire both beat grass pokemon. A hoothoot will usually come with hypnosis (to make the pokemon fall asleep) and peck (super effective on grass) so, make sure to catch hoothoot on your way to becoming the pokemon master!