Hpoke is a glitch Pokemon only found in red and blue
It is said to be the hybrid of gengar due to identicle base stats and duel type match
According to bulbapedia Here it evolves into gloom at lv225
When you receive gloom will it return to its normal lv and learn moves from its learnest
Or stay the same lv with glitch moves and gengar stats
Also will it's stats go on above lv100 eg spatk go to around 850at lv220
Yeah, it will clear moves from the learnset but not return to the normal level, and its stats can rise to 999.