Teleporting to Sans and Papyrus' house, Sans is seen sitting on the couch watching TV. Papyrus is cooking spaghetti.
"Sup, kiddo? Everyone knows now, It's cool using my powers."
"Cool." You spawn a Gaster Blaster and fly around on it "Heya Sans. I want you to train me."
"Um... okaay? Like, right now?"
"Yeah, sure. Unless your doing something." You despawn the Blaster
"Yeah sure. Step outside." Sans gets up and teleports outside.
As you step out, Sans is already dressed.
"So you went into your room. Is Frisk still sleep?"
"Nah. She's gone. Anyway... The only thing you seem to have trouble with is psychonesis and bones." Sans summons a large array of bones.
" Dodge these." He sends them all to you, which you block with a Gaster Blaster head. He summons a Gaster Blaster, which you teleport out the way of.
"Verrrrrryy clever."
*Whatever.
*Spawn a Gaster Blaster. (You summon a Gaster Blaster) Dissolve it. ( The Gaster Blaster disappears) Now, think of bones and summon a Gaster Blaster. (As he says, you think of bones as you summon a Gaster Blaster. A large group of bones in the shape of a Gaster Blaster appears) Easy as that.
*Psyconisis?
*Pretend you're Darth Vader.
*Oh... ok.
"Welp, I've done my job. Wanna go and prank people?"
"Well of course!" You say, matter-of-fact-ly.
