How to easily get Seedot in Pokemon Emerald

After entering the Hall of Fame, every time the player wins a battle, there is a 0.5% chance that the game will generate an outbreak.
During this time there's a 50% chance the game will generate the swarming Pokémon.

In Pokemon Emerald there are 3 Pokemon that can appear in Mass Outbreak :
- Seedot on Routes 102, 117 and 120.
- Nuzleaf on Route 114
- Skitty on Route 116