Little onyx

little onyx is a child scientist (who is sorta like rick). when he became a scientist princess celestia did not like what he was doing so he "took care of her and princess luna" so he could be a free pony with his friends.

he is an alicorn (must be somthing to do with where he came)

he was born in some other land long long long ago. little onyx is 120000 in earth years but 12 in his own timelines years.

hate everything about you by ugly kid joe is a song that might fit

little onyx's inventions

classy car

portal gun

volt

he was sent to this dimension as a child by his father to keep him safe.