Mikey Walsh ( Sean Astin) is the little brother of brad Walsh and has a one-way crush on Andy but the main quest is to find the rich stuff ( treasure) he is one of the big parts in the goonies while being asthmatic he still pushes he, himself and the others to the limit to find one eyed Willys treasure and save the day by buying his house and the other goonies houses from the bank where they want to sell onto the golf club.
"Chunk" ( Jeff b. Cohen) is the one character that every body loves but they don't let him know it. they make him do things like the truffle shuffle to try and embarrass him, which works in some ways and others don't. most of the time he is the cry baby and most of the time he makes people laugh by just being his normally happy self. if he finds and obstacle he will just eat his way through it, or give up. that's what most chunks are like.
Brad Walsh (Josh Brolin) is the muscular, handsome jock;
that’s pretty much the opposite of his younger brother, Mikey Walsh. He is the
oldest and biggest out of all the goonies, and he feels it’s his duty to keep
the others out of trouble, and his brother in line. He has ongoing flirtations
with Andy, the cheerleader. He’s there when the group needs his leadership and
strength.
Andrea “Andy” Carmichael (Kerri Green) as the pretty
cheerleader, gets caught up in the goonies hunt for one-eyed Willies treasure.
She lives on the wealthier side of town opposite the goon docks, but gives up
her boyfriend for Brad Walsh and joins the goonies adventure.
' mouth' Devereaux ( Corey Feldman) is the trouble maker son of the plumber in town down at the goon dock. he is known for his hip style of prince T-shirts and new haircut that he reckons brings the ladies down his way. mouths tongue gets him into trouble quite a lot like when he is a sarcastic know-it-all kid but it also comes in handy for how he can speak Spanish.
Data (Ke Huy-Quan) is the gooney who thinks he’s very
high-tech. He’s always making some new homemade contraption, and they usually
don’t work as he says they do. He thinks he’s like James Bond himself, but his
friends know that a lot of his ideas aren’t gonna work.
Sloth (John Matuszak) is the forgotten Fratelli son. He was
chained up in the basement by his corrupt and funny family, but later teams up
with Chunk to help the other kids escape Mama Fratelli and her boys. Sloth has
a very hearty appetite, and he’s like a very big kid. He soon becomes a new
member of the goonies.
Steff Steinbrenner ( Martha Plimpton ) even though she is from the goon docks she still hangs out with andy and the other rich kids in town. her and andy are best friends right from the beginning. even though her style is different in a weird way and shes not into the same thing as the other goonies shes still apart of them.