Adding a turtle shell state to Koopa

[hunghvu]

Implement all the interaction and turtle shell features of Koopa. Here is some information based on Mario Wiki.

1. If a Mario lands on a Koopa, the Koopa hides in its shell.
2. The shell can be kicked around and bounced off obstacles.
3. The shell can be used to attack enemies.
4. Super Mario and Fire Mario are revert to normal form if they get hit by the shell. A normal Mario will die instead.
5. The Koopa reemerges if a shell stays alone for too long.

Update: As of 02/22/2021, No 1-2-5 are completed. No. 3 and 4 are still not implemented so this issue will be kept opened.

[BenjaminDeJager]

I wanna clear up a few of these in case someone doens't know the original game.

(3) just in case someone doesn't know the game: the shell can't be used to attack enemies directly, its not something mario picks up its more that mario can use (2) and kick it into moving and then it kills enemies when it runs into them.

(4) is not quite right: super mario reverts to normal mario yes...but fire mario reverts to super-mario.

fire-mario effective acts as a 3'rd state and a third hitpoint.

(5) I don't know if the original game has this, but I know in later mario games there are koopa-less koopa-shells which obviously never have the koopa reemerge, but if a koopa-shelless koopa finds such a shell they will put it on. (see attached image I found online as a example

[hunghvu]

@BenjaminDeJager For (4) We are doing the original Mario version (Super Mario Bros). What you described as I know is a feature of later version, not the original one.

Source: https://www.mariowiki.com/Koopa_Troopa



Source: https://www.mariowiki.com/Fire_Mario

[BenjaminDeJager]

hm, really? I remember playing super mario and reverting to super form.

we might need to double check such things since we might not be using the japanese version. but good catch on the possable difference