This tag lumps together the mothers of the protagonist in Pokémon games — specifically only the nameless mothers of the protagonist.

Mothers who'd be lumped into this tag:

• Generation 1 - Red or Leaf's mother
• (LGPE) - Chase or Elaine's mother
• Generation 2 - Ethan or Kris or Lyra's mother
• Generation 3 - Brendan or May's mother
• Generation 5 (BW) - Hilda or Hilbert's mother (has her own tag mom_(pokemon_b&w), so use that as well!)
• Generation 5 (B2W2) - Rosa or Nate's mother
• Generation 7 - Elio or Selene's mother
• Generation 8 - Victor or Gloria's mother (has her own tag mum_(pokemon), so use that as well! Still nameless, but called "Mum" and not "Mom")
• Generation 9 - Florian or Juliana's mother

And, to clarify:

Mothers who should (generally) NOT be lumped into this tag, as they'd have their own tags:

• Generation 4 - johanna_(pokemon) (Dawn or Lucas's mother)
• Generation 6 - grace_(pokemon) (Serena or Calem's mother)
• Anime - delia_ketchum (Ash Ketchum's mother)