u/HoverLogic

Doc (the one on the right) is my original shiny Orbeetle I got on route 5 when he was just a Dottler… I got another one from the Max Lair.

Still haven’t found Uxie though…

Realistically, Sticky Hold and Symbiosis are kinda useless for this one, since they’d be holding a special item for the gimmick to work, so just ignore those.

1.) The two Pokemon must be somewhat similar—they must have something major in common. (Like Vikavolt and Orbeetle being beetles mixed with Sci-Fi technology.)
2.) They must have similar base stat totals (no more than a 20 BST difference)
3.) Double and Triple weaknesses are ignored and reduced to simple *2 weaknesses.
4.) The BST is the stronger Pokémon’s +100.

I imagine Chester would normally be a Fire-Normal type so he gets STAB with Flame Charge, Fire Punch, Flare Blitz, Extreme Speed, Slash, and Rapid Spin, with insane speed and pretty solid physical, with access to useful set up moves like Swords Dance, Double Team, and Shift Gear.

His Hisuian Form loses the Normal type in exchange for the Psychic type, trading away almost all speed and physical attack for great defenses and special attack. In this form, the spiraling hair turns into a spiraling vortex of flames when Chester uses his new psychic powers. With moves like Nasty Plot, Cosmic Power, and Calm Mind, he’s still a top tier offensive threat, and can get around his awful speed via trick room.

His signature move goes from the melee Asphalt Assault to Neurotic Flare Up, which turns Chester’s anxiety and stress into psychic flames that chase down the target, which may also turn their own psyche against them.

I’m not the most certain about how to approach this one, because there’s lots of tunnels and chambers, and I can’t host a picnic in those chambers.

—The Lunat line has a M:F gender ratio of 4:1 and is in the Field/Flying egg group. They’re in the Medium-Slow experience group and evolve at levels 17 and 35 respectively. All three are Psychic/Rhythm Type. 
— Their two signature moves are: 1) Gravity Crash, an 85bp, Psychic, Special move that intensifies gravity and will land crits easier on heavier targets. 2) Echo Mania, an 80bp, Rhythm, Special Move that has a 30% chance of confusion, and will get a 50% boost if the target is already confused. 
— Their signature ability is G-Force, allowing Psychic-Type Space moves like Gravity Crash and Meteor Shower to hit Dark type targets. Their hidden ability is Airborne, giving them the STAB boost for their Flying type moves, like Air Slash or Hurricane.

— The Tunja line has a M:F gender ratio of 1:4 and is in the Field/Humanoid egg group. They’re in the Medium-Slow experience group and evolve at levels 17 to 35 respectively. All three are Fighting/Ice type.
—Their two signature moves are: 1) Agility Paw, an 85bp, Fighting, Physical move that will land crits easier on slower targets. 2) Frozen Kunai, an 80bp, Ice, Physical Move that has a 15% chance of Freezing, and uses the target’s Special Defense. 
— Their signature ability is Phantom Fist, allowing Fighting-Type Punch moves like Agility Paw and Drain Punch hit Ghost type targets. Their hidden ability is Revenant, giving them the STAB boost for their Ghost type moves, like Phantom Force or Shadow Claw.

—The Lunat line has a M:F gender ratio of 4:1 and is in the Field/Flying egg group. They’re in the Medium-Slow experience group and evolve at levels 17 and 35 respectively. All three are Psychic/Rhythm Type. 
— Their two signature moves are: 1) Gravity Crash, an 85bp, Psychic, Special move that intensifies gravity and will land crits easier on heavier targets. 2) Echo Mania, an 80bp, Rhythm, Special Move that has a 30% chance of confusion, and will get a 50% boost if the target is already confused. 
— Their signature ability is G-Force, allowing Psychic-Type Space moves like Gravity Crash and Meteor Shower to hit Dark type targets. Their hidden ability is Airborne, giving them the STAB boost for their Flying type moves, like Air Slash or Hurricane.

— The Tunja line has a M:F gender ratio of 1:4 and is in the Field/Humanoid egg group. They’re in the Medium-Slow experience group and evolve at levels 17 to 35 respectively. All three are Fighting/Ice type.
—Their two signature moves are: 1) Agility Paw, an 85bp, Fighting, Physical move that will land crits easier on slower targets. 2) Frozen Kunai, an 80bp, Ice, Physical Move that has a 15% chance of Freezing, and uses the target’s Special Defense. 
— Their signature ability is Revenant, allowing Fighting-Type Punch moves like Agility Paw and Drain Punch hit Ghost type targets. Their hidden ability is Phantom Fist, giving them the STAB boost for their Ghost type moves, like Phantom Force or Shadow Claw.

I think Orbeetle and Vikavolt might be related, same with Garchomp and Dragapult.