It's not voting yet right? In that case I'll submit something.
I'll answer this.
Parents: Altaria + Meloetta
Shared egg group: DNA
Offspring name: Maria
New type: Psychic + Dragon
New base stats: 87 / 82 / 100 / 114 / 116 / 85 (+8 Atk, +17 Def, +15 SpA)
New ability and desc: Natural moves (Serene grace + Natural Cure) - Prevents this mon from being statused and getting hit by any secondary effects
Notable moves: Calm Mind, Hyper voice, Psyshock, Return, Frustration, Cotton Guard, Heal Bell, Dragon Dance, Roost, Fire Blast, Focus Blast, Knock Off, Quick Attack, Dragon Pulse, Zen headbutt
Role identification: This is actually designed to be a bulky sweeper. You can use it as a Mega sweeper or just being a non-mega. This thing has plenty of tools including many different set up moves from Cotton Guard, Calm Mind, even Dragon dance as well as healing moves like Heal Bell, Roost and all kinds of coverage. It's pretty versatile even in it's non-mega form.
Parents: Altaria + Meloetta
Shared egg group: DNA
Offspring name: (Altarianite)
New type: Psychic + Fairy
New base stats: 87 / 122 / 120 / 154 / 116 / 85
New ability and desc: Pixilate
Notable moves: Calm Mind, Hyper voice, Psyshock, Return, Frustration, Cotton Guard, Heal Bell, Dragon Dance, Roost, Fire Blast, Focus Blast, Knock Off, Quick Attack, Dragon Pulse, Zen headbutt
Role identification: Now THIS is the real deal. It got high Special Attack, Calm Mind and STAB Psyshock for physical set. It's also pretty bulky in both Physical and Special side. It also has usable Attack as well if you want to make it mixed or even pure Physical. And it has Cotton Guard AND Calm Mind to boost both sides of defenses. This'll be a pretty hard mon to take down if you're not careful.