That first ability is really fiddly. I think it should just be standardised, either as "[+2]: Create a 1/1 green and blue Turtle creature token [with guard]", and possibly also a separate "[0]: Create a 1/3 green and blue Turtle creature token" if you really want both.

That second ability is rather unimpressive, especially on a 5-mana walker. If it cost [0] it'd be interesting - effectively a [+2] unless the opponent wastes an attacker. At [-2]+2, netting out to [0], it's purely a "skip your turn". And okay, there are occasional situations where I can't defend a 'walker this turn but I'll be able to next turn; but still, it looks bad and looks like it'd feel bad.

Well it's flavourful, she's a turtle planeswalker so her -2 is turtling up.

The thing is that if it's 0 then you can just 0 her over and over and you're either abyssing your opponents creatures or she's ticking up unstoppably. There's no counterplay. You lose a creature and she's on the same loyalty. After some playtesting, maybe it could be a -1 or maybe a 0 that gives 1 loyalty so that the tick up is much slower.

With an ultimate like that, I don't think it matters if there's not much counterplay to her turtling up. If her middle ability cost [0] and I activate it every turn, then that means after I spend 5 mana in two colours on a mythic, the net result is... four turns later, I get an emblem making my turtles bigger. I get something like Assault Formation stapled onto Jacques le Vert. This is a fine turtley ultimate, but it's really not a particularly overpowering thing to get four turns after your 5 mana gold mythic planeswalker has done nothing else.

It's not even The Abyss, it's just a Trap Runner on whatever their evasive 1/1 is.

Mmm. Maybe the ult shouldn't be restricted to turtles then. It admittedly feels a bit like a Duel Deck Planeswalker now that I think about it.

I like the +2, even if the turtle feels a bit small.

Also like the +0, but maybe ther's a shorter/better way of writting it.

-8 should read 'You get an emblem with...'

Well, by itself the turtle is a chump blocker, which will save you from one attacker. It's important to note it has guard which means it can prevent 2 damage that an attacker would deal. If you survive one turn without chumping with the token then you have 2 1/2's and can prevent 4 damage that an attacker would deal. It stacks up quickly.

I reworded the 0 ability but it doesn't feel like correct templating now.

Something like:

"Prevent all combat damage that would be dealt to Johanna until your next turn. At the beginning of your next upkeep, put a loyalty counter on Johanna unless she was attacked since your last turn." ?

"+1: Until your next turn, whenever one or more creatures attack Johanna, remove a loyalty counter from it her and remove those creatures from combat."

Dunno, it's a hard ability to template...

Btw, you can use gendered pronouns for planeswalker cards, as I did in my template. There's precedent for this on e.g. Gideon, Ally of Zendikar.

Kauefr, that would mean that in a multiplayer game, each player could attack her with a creature and remove a counter each time (also stacks with additional combat steps).

For the same reason I can't say "Put a loyalty counter on her unless a creature attacked her last turn"