Kinda a surprise the light itself didn't take the form of a new waifu for his harem along with Elf and Mabel.
The spirits don't really care about humanity, let alone take their forms, since they are in different spectrum.
They're good with uncle just because uncle is the only one who could talk with them (thanks to his isekai power he got) and he's being polite to them.
Still waiting for that Pulseman 2 for the Dreamcast. Surely Game Freak will stay loyal to Sega over Nintendo...
They're already busy enough with Pokemon.
But they did turn to SEGA once when they publish non Pokemon games.
Remember Game Freak's Tembo The Badass Elephant?
SEGA is the one they trust to publish the game.
Link :
https://store.steampowered.com/app/341870/TEMBO_THE_BADASS_ELEPHANT/