After Flareon, I want to make new Mega forms for the other members of the Eeveelutions family as I already taken care of Flareon, so following it is Jolteon. A fan-favourite Pokemon from a fan favourite Pokemon family, there are many fan-favourite Pokemon that currently have Mega Evolutions at the moment though too many of them can create anarchy in the competitve aspect.
My version of Mega Jolteon is giving it Water as secondary typing because I want to give Jolteon a comeback after losing Hidden Power from Generation 8 onwards. Too bad Jolteon gets no Water-type moves, but it has access to sound-based moves like Alluring Voice, Disarming Voice, Hyper Voice so it makes up by having the ability Liquid Voice as an ability option for its revenge against Ground-type Pokemon.
Liquid Voice is an ability only available to Popplio's family that turns all sound-based moves into Water-type moves and Hyper Voice, Alluring Voice, Disarming Voice which are the only Sound-based attacking moves Jolteon gets access to. So Ground-type are no longer safe, but Jolteon gets to be weak to Grass due its the secondary type being to Grass moves.
When Jolteon Mega Evolves, it's Defense is boosted by 40 points, Special Attack and Speed get boosted by 30 points. Its current abilities are Volt Absorb and Quick Feet.
Jolteon should better get access to Spiky Shield, Nasty Plot, Spikes, Grass Knot, Snarl, Rasiing Voltage and Parabolic Charge.
Mega Jolteon base stat:
HP: 65
Attack: 65
Defense: 100 (+40)
Special Attack: 140 (+30)
Special Defense: 105 (+10)
Speed: 150 (+20)
by LightInteractives