Gulpin in Emerald.
Gulpin appears in 2 places in Pokemon Emerald. The best odds are Route 110 (walking in grass or caves, 10% at level 12).
Where to find Gulpin
odds are the game's slot tablesEvolution
2 stages
Gulpin
SwalotEvolves into Swalot at level 26.
Evolve now or wait
from the game's learnsets and the relearner ruleGulpin evolves at level 26. Nothing is lost by evolving straight away: every move Gulpin learns after that, Swalot learns too.
Rule the game applies: the Move Relearner in Fallarbor Town (he takes a Heart Scale) teaches only the level-up moves of the form you hand him, at or below its current level. Delaying an evolution costs the evolved form's higher base stats for every level you wait; a move you barely use is not worth that.
Gulpin learnset in Emerald
11 level-up moves · 23 machinesBy level
Swalot by level
TMs and HMs it can learn (23)
HM04 Strength, HM06 Rock Smash, TM03 Water Pulse, TM06 Toxic, TM09 Bullet Seed, TM10 Hidden Power, TM11 Sunny Day, TM13 Ice Beam, TM17 Protect, TM18 Rain Dance, TM19 Giga Drain, TM21 Frustration, TM22 Solar Beam, TM27 Return, TM30 Shadow Ball, TM32 Double Team, TM34 Shock Wave, TM36 Sludge Bomb, TM42 Facade, TM43 Secret Power, TM44 Rest, TM45 Attract, TM49 Snatch