I feel like this is an enrichment idk tho

infection stages stage 1: initial shock, happens when someone is first infected, and it usually takes a bit for the victim's body to get used to the change as the victim's mind goes blank. It takes a few seconds to a few minutes for the victim to head into stage 2.

stage 2: wide grin and victims' pupils roll back, sometimes the victm's mouth will gape into a wide smile that will cause the victim to drool the black liquid, or it could just be a wide grin.

stage 3: elongated limbs, power amplification, mindlessness, better speed.

stage 4: can have one of their arms mutated into a dark purple spike with a yellowish white tip that serves as the blade, and they can stab and infect you.

stage 5: yeah bro if you see someone in stage 5 your cooked. Strength amplification, being able to place some puddles of The Darkness in places/routes everyone would take to get away, lunges that can take away like 50% of distance.

infected: Four, Tennis Ball, and every Algebralien in the Equation Playground (The Equation Playground is located in a whole different planet so you'd have to either get Two or Four or X to send you there, or you'd have to use Announcer's spaceship in BFDI.

infected(s) stages: Four (stage 1), Tennis Ball (stage 2).

Tennis Ball is a male.

It was supposed to be a good time in BFB, until The Darkness showed up and ruined it all.