why would you do that?
example - you have these 3 sprites - walls, enemies, player. you have 10 instances of walls, 5 of enemies, 1 of player.
why would you pick each of these instances (including walls) which have var boo ? why would wall even need to be picked ? (in example where you want to check all enemies and yourself)
best would be to use family if you really want all instances, but that family will contain every sprite. it seems wrong whatever you are doing
On Object B tween ended I need to compare if a string created from several "keys" sent out from several Object's A and received by By object C match required "Key" of Object C. If not, all objects B got to return to their original position via tween, Objects A and Object C got to reset their state. So I need to pick all Objects A within a group, set trough group variable and change their boos and their variables. Basically a switch puzzles that differ depending on their variables. Sometime spuzzle is: switch in correct order, other time, press those leave others, and yet another time it press all, or add item.