Seladian and Arsiondose

Arsiondose
Dex: It is believed to be the most potently toxic spider in the world. It is believed that it tried to repel a swarm of Seledians that were coming to this world.
Bug/Poison
Superpoison Pokemon
Abilities:
1 Sniper
2 Swarm
Hidden Toxicity*
Stats:
HP 68
Atk 131
Def 70
SpAtk 60
SpDef 60
Speed 86
BST 475
Evolves from Ariados while holding Poison Barb at Lv 55 or higher
EV Yield: 3 Atk
Egg Group: Insect
Egg Moves: Same as Spinarak
Moves: Same as Ariados, but 3 levels up for each move, and at Start level is Twineedle, Cross Poison and at Lv 55 is Gunk Shot.
TMs: Same as Ariados, but it can learn Earthquake, Flamethrower, Incinerate and Fire Blast.
Tutor: It can learn Superpower and everything Ariados can.

Seladian
Bug/Steel
Iron Fist Pokemon
Dex: A Seledian is believed to be an interstellar traveller that brung the first species of Ledybas and Ledians. It is always in feud with Arsiondose, which tried to repel against it when it came to this world.
Abilities
1 Iron Fist
2 Swarm
Hidden Extra Punch*
Stats:
HP 70
Atk 75
Def 75
SpAtk 110
SpDef 110
Speed 30
BST 475
Evolves from Ledian when you level it up at Lv 55 or higher while holding a Metal Coat
Egg Moves: Same as Ledybas
Egg Group: Insect
Moves: Same as Ledian, 3 levels above normal, but at Start LV there is Thunderpunch, Ice Punch and Fire Punch, and at Lv 55 it learns Meteor Mash.
Ev Yield: 3 Atk

Toxicity: The Pokemon is able to damage Steel types with Poison-type moves.

Extra Punch: All Punching-related moves are treated as a pseudo "Double Kick" move (excluding Focus Punch and multi-hit punching moves); with the second hit of the punching move have a 50% damage modifier on the move.