FRIEND-CLYDE AND KENNY
when you start, enter koopa keep and DONT TALK TO CARTMAN, wait and talk to clyde and kenny first, they will unfriend you but is needed for all friends achievment.

when you finish the quest you cant go back to tower of peace, so it is missable.

-chinpokomon lambtron
in the second floor he wil be hanging down. shoot it, is a yellow bird.

-mongorian bow
on the second floor kill the mongorian children and loot them

-Chinpokomon poodlesaurus rex
when you enter the school defeat the hall monitors and there will be an air vent, shoot it and the chinpokon will fall.

-Dodgeball
loot the hall monitors and one will drop

-mace of restoration
after defeating the boss, open a locker close to mackey's office

-elvish shortbow, dont know if this is in order, but when you get to the basement FIGHT the elves to get the bow, dont avoid combat

-Wood elf gloves
loot the elf in the attic

-Chinpokomon roidrat
it wiill be sitting next to the elf in the attic, is a big rat with muscles

-crutch of weakness
loot jimmy (the bard) after defeating him

-wood elf cap
in the same room after defeating the bard loot an yellow chest

-alien helmet
behind randy after you learn how to teleport

-alien ray gun
defeat the first two groups of aliens and you will automaticly get it

-alien suit
when you take the levator there will be a purple chest, open it.

-alien gloves
dropped by the space officer in the room you save randy, loot him.

-tinfoil hat
after getting the alien gloves (ABOVE) you will go back to the hallway, before saving randy go down the stairs in a red hole, kill the hobo and loot him.

-alien probe
before saving randy head back down the elevator and open the chest in the left side of the room

-chinpokemon beetlebot
after getting the white diamond to repair the elevator, go down the elevator and DONT OPEN THE DOOR, shoot the panels in the room and beetlebot will drop.

-stone hammer
in the roof of the C.I.A building, use alien probe to get there

-Swat armor,helmet, and gloves
after the nazi zombie kill the two swats, loot them.

-chinpokmon gunrrila
in the secret meeting room you get the cellphone with the recording, it will be at the top of a closet,shoot it down.

after the ufo site where the nazi zombies appear, nazi zombies will start to appear on the map, go to the police station and the officer will give you a quest to kill 5 of them, complete the quest before the quest after canada quest, or else you will miss it. the fastest way is going to the lost forest and killing them there

thats the quest to go loot cartman/kyle table on the school depending on wich side you choose

-chinpokmon donkeytron
when you enter the kitchen, it is inside an oven.

-basketball
in the cafeteria there will be a student already dead, loot him.

-necromancer gloves
search one of the kid you defeated before leaving the cafeteria

-necromancer robes
defeat the nazi zombie ginger in the second room of the basement and loot him

-necromancer hood
there will be some kids attacking tweek or an elf in the second floor, defeat them and loot them.

-chinpokmon pterdaken
on the second floor, to tthe right of you get the necromancer hood above open the locker and shoot the chinpokmon

-friend bill/fosse
they are going to be attacked on the second floor,left of the necromancer hood. save them and they will be your friends

-friend lemiwwinks
this one is really easy to miss, in the 5 grade classrom talk to a rat and he will be your friend

-equipment (exclusive to class)
is in the 4 grade classrom, dont attack any of the guys, first loot a chest on the left of the room, you will be granted an exclusive equipment to your class

note: be sure that your door are closed or you are alone in your home, playing this on tv while your parents are on your home is DEFINITIVELY not reccomended

-gnome gloves
loot the gnomes after you killed the first group (when they wake you up)

-gnome helmet
climb the first set of wires and there will be a bag, loot it.

-super bouncy ball!
the same place as gnome helmet

-gnome clothes
after you had a scene with you parents on the vent,climb the wires to your left and break the wall on the left and grab the chest after the eletric area.

-gnome pickaxe
go to your right after getting the gnome clothes, defeat the 3 rats and then loot a bag in the right of them.

-underphants helmet
while seeing your parents doing "things" you will be attacked by gnomes, kill them and loot them.

-poison granade
before entering the room where you break the abortion equipment, loot the drawer and you will get it, its also the best ranged weapon so do not miss this even if you arent going for the achievment

-master razor
after getting the information and being locked, enter the mouse rat while in gnome form and there will be a yellow bag, loot it.

-chinpokmon fetuswami
when you go back to the main hall, where nazi babies attack the police,go foward until the turret gun part, defeat the turret and explode the wall with your fart and you will get the chinpokmon.

note: you CAN go back to canada but there is ONE missable friend and achievment that you cant go back

-friend bishop of banff
after defeating him he will tell you to get the pigs balls, accept it. it wont change anything exepct you get his friend request.

-truth to power achievment
this one is off topic as it isnt any item nor friend, but fart on the minister that translate france, it is needed for the truth to power achievment and he wil disappear forever after that

-lawn dart
yellow chest on the first floor

-knights gauntlets
also in the first floor, but in the upper part. get it by defeat the cyclops

-friend ike
he will try to light a firework and will fail, light it for him using your farts

-chinpokmon shoe
use the alien probe and walk to the right and you will get it

-knight helmet
go to the right tower after helping ike

-knight armor
it will be in a yellow chest after defeating craig and the nazi cows

this is tecnically in clydes fortress but i decided to split to make it more easy :)

-friend big gay AI
he will be at a cellphone, interact with it and you will friend him

-viroblade
search the bacteria to the right of big gai ai phone

-condom cap
the best helmet in the game by far so dont miss it! it is in a chest after you scare the bat.

you can sell all of the equipments, you just need to get them once.

no, kenny and craig and AI GORE wont unfriend you so you can do this quest safely, clyde will but it will still count to the achievment

commom misconception is that sparkles club is missable, no you can go back to it in the basketball area.

getting all of the chinpokmons is required to get all of the friends bc one of them is a reward for getting all of them

most of the not missable ones you can get by buying from the elves, kkk, sparkles club, mackey and jimbo

please rate this guide i spend 10h+ testing every missable item in the game and 1h writhing all of this. thanks for reading and let me know in the comments if you want a guide on some achievment.