Yes, even fan videos depict him wearing cappy in 64, which later appeared in Odyssey.
However, according to my sources, the videos are all fake, he never wears cappy in 64/64DS.
And no, comic sans is part of another series, undertale:
https://www.tcrf.net/Undertale(The Cutting Room Floor link for Undertale)
That was for the PC, not the 64 nor the DS.
