But no, you had to come up with something that fits only your headcanon. I won't give anything against your character if his parents were alicorns (the ones that from Marypony, not others made up for something), I won't give anything against him if he had powers like teleportation or invisiblity like normal alicorns in FoE do. Alicorn/pegasicorn as a son of earthpony and unicorn? Unbelievable. All written in a text that is nice to read and doesn't make eyes bleed. You can write well, but you can come up with OOCs, Mary Sues and other kind of trouble. The quality of text isn't the same as quality of story. Doesn't that kind of invalidate all of those 'nopes' earlier?