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>Lilycove Museum has paintings of Arceus and Giratina
>There are secret base mats for Turtwig, Chimchar and Piplup even though they're, at the moment, the oldest starters and thus least available (HG/SS more recent, then came Gen 5 and 6, and you could get Gen 1 starters, then ORAS)
>Snow city in XY has a girl talk about a snowy region far away and play the Jubilife City theme, just because
>Sycamore studied under Prof Rowan
>in Fallarbor Town the ruin maniac talks about Sinnoh ruins
Sinnoh confirmed