Pokemon Legends: Arceus, which took place in a historical version of the Sinnoh region, shocked fans by showcasing starters not native to the fourth generation game. Cyndaquil, Oshawott ...
Both Totodile and Chikoria come from the second generation of Pokemon games (Gold, Silver, and Crystal). Cyndaquil, the third option in their trio, was already a starter in Legends Arceus.
What's bizarre about that is that the first two of these three starters are from Johto (Generation 2), whereas Legends: Arceus had one starter each from Johto, Unova (Generation 5), and Alola ...