Funny how you consider Belize, considering I keep forgetting about it. Then again, Belize is like the black sheep of Central America.
read it's colonial history, could be tied in to Alola, Galar and Kalos actually.
about water starters.... did someone watched Dora and the Lost City of Gold ?
If they would create a yellowish water starter jaguar aztec warrior water/fighting like female even with a priority water move similar to First impression and with a ability like Survival Instinct to avoid the first SE attack of in battle and that could work again when switched out-in again... bc water/fighting is a fragile typing actually
maybe mixing things up more and not one location would be better? 1/4 part region like spain, italy , greece 1/4 desert area like middle east and egypt could be with australia, 1/4 tropical jungle like mayan and aztec like and 1/4 region icy mountains in canada, norway? a total mix up?