The Relation Game

[Corrin]

Helioptile is found on Route 9!

 

[Sirfetch’d]

Pikachu, an electric Pokemon like Helioptile!

 

[illumine]

Pikachu evolves using a Thunder Stone.

 

[Hikamaru]

Eelektrik, another Pokemon that evolves with a Thunder Stone.

 

[blue]

Zap Cannon, a move that Eelektrik can learn.

 

[Dedenne1]

Regice, a legendary pokemon from hoenn, can also learn Zap Cannon!

 

[Meadowy]

Brandon owned a Regice in the anime!

 

[Corrin]

Brandon is a frontier brain

 

[Sun]

Frontier Brain is also available in at least three Gen IV games.

 

[Corrin]

Caitlin is one of them in gen IV

 

[noa]

Musharna, a favorite Pokemon of Caitlin.

 

[Hikamaru]

Beheeyem, another 5th Gen Psychic-type.

 

[waveguidebuizel]

In the beginning of Super Mystery Dungeon, some beheeyem chase you and Nuzleaf.

 

[blue]

Leaf Stone is required to evolve Nuzleaf into Shiftry.

 

[Hikamaru]

Ludicolo, which is Shiftry's version exclusive counterpart.

 

[illumine]

Ludicolo's first form, Lotad, uses the move Astonish in their first appearance in the region.

 

[Corrin]

Astonish is a ghost type move

 

[Dedenne1]

Haunter is a ghost type pokemon from Gen 1

 

[Corrin]

Haunter evolves via trade

 

[Wicked3DS]

Graveler evolves via trade.