
There's more then one way to skin a cat, or in this cause encounter a pokemon. Here we give you a few options for pokemon you can encounter and how. These alternative cost -3 Rp Posts each.
Fishing
Old Rob
East Growto
1 - Tentacool
2 - Magikarp
3 - Horsea
4 - Shellder
5 - Staryu
6 - Chinchou
7 - Clamperl
8 - Luvdisc
9 - Finneon
10 - Frillish
West Growto
1 - Tentacool
2 - Magikarp
3 - Goldeen
4 - Remoraid
5 - Qwilfish
6 - Carvanha
7 - Barboach
8 - Feebas
9 - Binacle
10 - Skrelp

Good Rod
1 - Seadra
2 - Seaking
3 - Cloyster
4 - Corsola
5 - Wailmer
6 - Basculin Red [ West Growto ]
7 - Basculin Blue [ East Growto ]
7 - Whiscash
8 - Alomomola
9 - Lumineon
10 - Lanturn

Super Rod
1 - Gyarados
2 - Tentacruel
3 - Octillery
4 - Mantine
5 - Sharpedo
6 - Wailord
7 - Relicanth
8 - Jellicent
9 - Barbaracle
10 - Dragalge

Impact
The moves Headbutt, Tackle, Take Down, Double Edge, Double Kick, Giga Impact, Mega Kick, Mega Punch, Skull Bash, and Slam can be used in any city without a Gym to encounter a Lv 10 pokemon from the list below with a 10-sided-dice roll.
1 - Caterpie
2 - Weedle
3 - Wurmple
4 - Sewaddle
5 - Scatterbug
6 - Pansage
7 - Pansear
8 - Panpour
9 - Pachirisu
10 - Sunkern
11 - Cherubi
12 - Mankey

Honey
1 - Aipom
2 - Beedrill
3 - Beautifly
4 - Butterfree
5 - Cherubi
6 - Combee
7 - Heracross
8 - Munchlax
9 - Venomoth
10 - Vivillon

Rock Smash
1 - Geodude
2 - Shuckle
3 - Roggenrola
4 - Dwebble
5 - Baltoy
6 - Beldum
7 - Bronzor
8 - Nosepass