Level 53.
Heracross learns megahorn at level 55
It learns Thrash at level 22 and Megahorn at level 43.
only heracross' good moves are listed here: * night slash * megahorn * close combat * brick break * horn drill
Heracross would be a better choice because Scizor has terrible special defense and since its really weak against Fire types it would be a bad choice, Heracross has really high attack power and can learn really good moves like Reversal, Endure and Earthquake and Megahorn definetely a better choice.
Jolteon can't learn Spark on Pokemon FireRed.
A Pokemon has to learn it as it levels up
Two off the top of my head are: Wobuffet and Heracross.
Pokemon!!!!!!!!
Heracross only learns one Bug-Type attack and that's Megahorn (Power:120, Accuracy: 85%) . He learns it at level 54 in gen 2, 53 in gen 3 and 55 in gen 4 and 5.
nidoking will learn megahorn at level 43....thats the way it is...ok men?
Heracross will learn Reversal at Level 45 in Generation 3's games (Ruby, Sapphire, FireRed, LeafGreen, Emerald) however it will learn it at Level 43 in Pokémon Diamond, Pearl, Platinum, HeartGold, SoulSilver, Black, White, Black 2 and White 2.
Of course.