Sceptile/Tyranitar

Absol + Cresselia

Feebas/Magikarp - And let's make it shiny because Wynaut.

Vileplume/Spinda/Tentacruel

Milotic/Garevoir

Sigilyph/Bronzong

Rattata/Venonat

Shaymin/Vaporeon

Electivire/Tangrowth

Boldore/Stantler

Growlithe/Vibrava

Slowking/Rufflet