Were are the z fighter exhibits?

My, my, this will be a long one.

Z-Fighter Exhibit 1 (Goku's Power Pole) - Go to where Babadi's ship is
(or where it was), and go to the upper right hand corner, there should
be a chest, use Goku's Instant Transmission to get to it.

Z-Fighter Exhibit 2 (Yamcha's Bat) - In Diablo Desert go 2 screens
up and 2 screens left break the rock in that area with a ki blast,
it should drop the exhibit.

Z-Fighter Exhibit 3 (Gohan's Training Sword) - Go into Goku's house,
then go upstairs into Gohans room. There should be a purple box in his
room, go up to it and press A.

Z-Fighter Exhibit 4 (The Bansho Fan) - Go into the forest next to Goku's
House, then go past the level 140 Gohan Door, there will be an area with
a lot of rocks, punch and break one of the rocks (fourth rock down), go
through to the end and get another exhibit.

Z-Fighter Exhibit 5 (Ox-King's Helmet) - After you complete the game
go into Goku's House and talk to Ox-King, he will give you it.

Z-Fighter Exhibit 6 (King Kai's Hammer) - Talk to Bubbles in the cave
(where Olibu took you) after Beating Kid Buu.

Z-Fighter Exhibit 7 (Ginyu's Ship) - In West City, go into the Capsule
Corporation, go right and into the room where DR. Brief is
and talk to the scientist.

Z-Fighter Exhibit 8 (Baba's Crystal Ball) - After you beat Kid Buu go
into King Yemma's Office, talk to Baba and she will give you it.

Z-Fighter Exhibit 9 (Mr. Popo's Turban) - Go to Kami's Lookout, go to
the top left and there will be 4 trees, in the very middle there will
be a bit you can't walk past, just hit there and it will open up a chest
with the exhibit inside (it is pretty much invisible but if
you look hard enough you can see it)

Z-Fighter Exhibit 10 (Broly's Crown) - At the Village, go up the mountain
and fight Broly (the monster) after you defeat him he will
drop you another exhibit.

Z-Fighter Exhibit 11 (Android #20's Hat) - Revisit the Diablo Desert,
break the door open when it is purple (for Trunks) then go onto the train,
go to the end of it and kill all the enemies, one of
them should drop the exhibit.

Z-Fighter Exhibit 12 (Yajarobe's Sword) - Spin around Yajarobe 3
times in an anti-clockwise direction, he will drop the exhibit
in the Southwest forest, it will drop next to a man in a blue suit.
Now it's time to go and claim your exhibit

Z-Fighter Exhibit 13 (Korin's Cane) - Feed Korin a Red Snapper,
some people said it has taken them up to ten times of feeding him,
so I'd save it before you try.

Z-Fighter Exhibit 14 (Grand Kai's Boom Box) - Talk to Grand Kai on his
planet after beating Kid Buu, he will be next to his car with King Kai.

Z-Fighter Exhibit 15 (King Yemma's Mug) - Revisit Pilaf's castle with Goten,
make sure you've gone through his 140 door or it wont work. Go to where you
got the Dragonball, kill all the enemies in that room, one of them should
drop the exhibit, you may need to re-enter the room a few times.

Hope this helps you!

Source: http://www.gamefaqs.com/gba/920530-dragon-ball-z-buus-fury/faqs/35324