That would actually be really cool. It would give the artists some creative wiggle room without forcing them to make dozens of brand new designs every year. Let's come up with some Galarmons
>Pikachu
Pikachu aren't native to Galar but are incredibly popular as pets. Due to being spoiled, they've gained weight.
>Unown
Their forms appear to be similar to runes used by humans in the distant past.
>Luvdisc
Massive schools of this fish travel along Galar's coast during the spring and summer. When a Luvdisc gets separated from its school, it can find its way back through instinct alone. (Schooling ability)
>Shellos & Gastrodon
Galar's cold waters have allowed Shellos to grow larger. They swim gracefully on winglike fins.