GokhanDBZfan said:He didn't expect Gotenks to be able to put up a fight against Evil Boo, not Fat Boo.Even in ROSAT, when Gotenks fails to beat Buu, Piccolo comments that Gotenks did better than he expected, meaning that him even managing to fight near Buu's level wasn't something he expected him to be able to do.
False.
In the viz translation, it reads:
Chapter: 487 (DBZ 293), P13.4-5
Context: after evil Boo shows up and demands to fight Gotenks
Piccolo: “Go hit Trunks and Goten to wake them up, and take them into the Room of Spirit and Time…! Even in just 1 hour, they’ll be able to do 15 days worth of training.”
Kuririn: “Heh!? If we do it now…”
Piccolo: “Can’t you tell fusion hasn't been enough yet?”
Now, Krillin, Goten and Trunks can't tell that Buu got stronger, and here Piccolo is stating that Gotenks isn't enough to face him. Even Trunks admits that they couldn't beat Buu before.
Buu says base Gotenks is weak:
Chapter: 490 (DBZ 296), P4.1-2
Context: after Boo smacks Gotenks
Gotenks: “Heh…hehen…! You’re pretty tough, aincha?...W-well, I pla-planned on that…!”
Boo: “Enough already. You’re weak. This isn’t any fun, so I’ll kill you.”
And finally, Piccolo points out (even after Gotenks fights Buu as a SSJ) that this is the first time that Buu has fought someone as strong as him, meaning SSJ3 Gotenks.
Chapter: 495 (DBZ 301), P6.1-3, P7.1-3
Context: after Gotenks blasts Boo with the Rapid-Fire Die-Die Missiles and Piccolo stops him
Gotenks: “Well, whatever. I already did quite a lot, after all. He should be pretty weakened.”
*Boo comes out*
Gotenks: “…He ain’t weakened…This really pisses me off!”
Piccolo: “N-no…He is weakened…I don’t know about physically, but he’s weakened a little mentally…! Th-this is the first time…that he’s fought someone strong like you…He’s feeling flustered by someone whose strength is at least on par with his own…”
No, Gotenks was the ONLY fighter who could have done something at this point.GokhanDBZfan said:Chapter: 492 (DBZ 298), P10.6
Context: after Piccolo blows up the entrance to the Room of Spirit and Time
Piccolo: “…You truly are strong…Unfortunately, not even Gotenks there could defeat you…However, no matter how strong you may be, it is now impossible for you to escape here, for the rest of your life…”
Piccolo pretty much implies SSJ Gotenks was the strongest fighter to challenge Boo up to that point.
Daizenshuu 2 states Gohan=Goten in battle power, so the guidebook doesn't mean anything.
He didn't expect Gotenks to do much at all.
Beyond that, the Guidebook states that base Goten and Gohan are equals, but not in SSJ. Read the entry again. Beyond that, I'm speaking of the character bios from Daizenshuu 7, which it states that Gotenks is inferior to Vegeta until after Roast and SSJ3, PIccolo seems to agree.