So, what would you think of:
Mega Arbok
Poison/Dark
Strong Jaw
PS: 60
Attack: 125
Defense: 84
Sp. Attack: 65
Sp. Defense: 94
Speed: 110
The combination of Intimidate before megaevolving + better stats + just one weakness and one immunity thanks to a new great typing + 120 base power (before STAB) Crunch + lots of good coverage moves would certainly rescue Arbok from the pits of NU. What would you think?
As for its design, it should have an even fiercer/darker belly pattern plus a new one on its back, like actual cobras do. Maybe a stronger jawline and a longer body. It could also have a mimetic tail like the snake in the pic, but one that resembles the belly pattern. Or maybe they could leave that for a new poké design.
View attachment 14886
And also:
Mega Octillery
Water or Water/Dark
Mega Launcher
PS: 75
Attack: 105
Defense: 100
Sp. Attack: 145
Sp. Defense: 100
Speed: 55
The design should incorporate vampire squid elements. It should be curled inside out like this with its mouth/launcher sticking out beneath the tentacles:
http://www.capital.es/wp-content/uploads/2010/11/vampyroteuthis1-284x300.jpg