What are you talking about?
Do you mean you want to play with each team having only 1 hedgehog?
That's already possible, just set the number of hedgehogs to 1 for each team in the game configuration.
Click on the hedgehogs in the list of teams. That's all.

Fun thing is, your very own video proofs that this is already possible in Hedgewars, so I have no idea what you actually want.

That's not what i meant, The gamemode is Single Hedgehog Battle, each hedgehog has 500 HP. or you could use another idea slimiar to Survival Game mode from Worms Ultimate Mayhem

Um, do you mean that each team has few Hedgehogs, but only one is on the map at a time?

Yes, As I said, If one of them dies, another one will appear.

Kinda related: In game scheme you can set infinite AI respawns. So you could create an AI team and then e.g. play 1 vs 1 with the AI hog respawning whenever it dies.
Infinite respawing isn't available for players though.

I ls what you want that the hog 2 of each team only arrives on the map when hog 1 of the same team died? and when hog 2 dies hog 3 will appear, etc?

That'd be an interesting mode actually. And not that hard to make in lua either I think.

Ah-Ah, I'm not talking about infinite AI respawns, I just talk about a new mode that is slimiar to Worms Ultimate Mayhem's Survival gamemode.

Not sure if you read the second paragraph of ehat I said.
And I don't know that mide but I guess I'll look it up on the web when I get the chance.

Yeah, that sounds exactly like sheepluva's 2nd paragraph. XP

Not hard to implement. I think I even made a similar mode a few years back where the players kept respawning, but the win condition was "first player to x kills" not "last player to x deaths". Just my opinion, but I thought that was better as it helped prevent other players ganging up on one guy, and discouraged darkside tactics.

On a side note: Man, those speech banks are so nostalgic.