: Didn't realize that the shells weren't always available in the first place.
There are a total of 14 shells available, with infinite regeneration, and a maximum of 10. Twelve of the 14 originate in the 2x recharge room and the other 2 in the bridge room. Let's suppose a player enters the bridge room having no shells (perhaps because they used them all and didn't think to check for more in the 2x recharge room, or they used them getting to the bridge room, or whatever), grabs the 2 that do teleport here, uses them both, but unfortunately does not raise the bridge successfully. The game will then regenerate 10 extra shells. However, the game may regenerate all 10 back in the 2x recharge room. In that case, the player no longer has access to those shells.
If we change the max from 10 to 14 and leave all shells where they are, won't the game have to regenerate 2 of those 14 in the bridge room, no matter how many the player uses?