Is canon relative
These Pokémon are related to a new fakemon in some way, usually by evolution, as a counterpart or by receiving a new form.
Canon Pokémon tagged "Is canon relative" (28)

Farfetch'd |
Normal Flying |
Keen Eye, Inner Focus |
Defiant |
52/65/55/58/62/60 |

Natu |
Psychic Flying |
Synchronize, Early Bird |
Magic Bounce |
40/50/45/70/45/70 |

Xatu |
Psychic Flying |
Synchronize, Early Bird |
Magic Bounce |
65/75/70/95/70/95 |

Mega Ampharos |
Electric Dragon |
Mold Breaker |
90/95/105/165/110/45 |

Slugma |
Fire |
Magma Armor, Flame Body |
Weak Armor |
40/40/40/70/40/20 |

Magcargo |
Fire Rock |
Magma Armor, Flame Body |
Weak Armor |
50/50/120/80/80/30 |

Carvanha |
Water Dark |
Rough Skin |
Speed Boost |
45/90/20/65/20/65 |

Mega Sharpedo |
Water Dark |
Strong Jaw |
70/140/70/110/65/105 |

Sharpedo |
Water Dark |
Rough Skin |
Speed Boost |
70/120/40/95/40/95 |

Swablu |
Normal Flying |
Natural Cure |
Cloud Nine |
45/40/60/40/75/50 |

Mega Altaria |
Dragon Fairy |
Pixilate |
75/110/110/110/105/80 |

Altaria |
Dragon Flying |
Natural Cure |
Cloud Nine |
75/70/90/70/105/80 |

Zangoose |
Normal |
Immunity |
Toxic Boost |
73/115/60/60/60/90 |

Seviper |
Poison |
Shed Skin |
Infiltrator |
73/100/60/100/60/65 |

Pachirisu |
Electric |
Run Away, Pickup |
Volt Absorb |
60/45/70/45/90/95 |

Cherubi |
Grass |
Chlorophyll |
45/35/45/62/53/35 |

Cherrim |
Grass |
Flower Gift |
70/60/70/87/78/85 |

Lopunny |
Normal |
Cute Charm, Klutz |
Limber |
65/76/84/54/96/105 |

Mega Lopunny |
Normal Fighting |
Scrappy |
65/136/94/54/96/135 |

Blue-striped Basculin |
Water |
Rock Head, Adaptability |
Mold Breaker |
70/92/65/80/55/98 |

Basculin |
Water |
Reckless, Adaptability |
Mold Breaker |
70/92/65/80/55/98 |