dufus: for the hundredth time, this is not Sonic.
scratch: but that might be Sonic in disguise!
dufus: no, none of us are Transformers, and neither Sonic is.
grounder: can you hold me like that? it looks so comfortable...
dufus: sure, but wait for your turn first.
They're going to the beach for a picnic! D.U.F.U.S. ("Doof") is gonna teach Scratch and Grounder how to surf (at their request) while Coconuts takes a nice nap in the sand.
i think shapeshifters are cool. the idea of being able to assume any form yet having only a few number of preferred forms is pretty nice.
this probably is a derivative thought out of loving robot shows in general. transformers may not look like shapeshifters in general, but every time they scan a new alt mode they change. even without the concept of transformation, the idea of having their core thoughts transferrable effectively makes them shifting shapes; implanting mind into another body does count. in fact, there aren't many mecha shows that i liked that does not involve transforming robots or transferrable cores.
and then it's not difficult to claim that the number of shapes they can shift into without too much cost correlates to their strengths. sixchangers probably are good examples; they're pretty high up in the ranks or freelancing without much troubles. and for a stupid example dino geist might as well be more powerful than exkaiser (non-combined) because dino geist got 3 modes while exkaiser got 2.
all of this leads to a conclusion that dufus has unrivaled strength, judging from how effortlessly he transforms into different alt modes.
scratch and grounder want fans. every time they got tricked into believe that they had fans from the show by sonic, they reacted very positively, be it being on radio, on muscle show, or on receiving letters from fans. i think they can make it with their comedic instincts but getting started part of becoming famous on live shows would be a challenge for them.
sonic would unironically help them if it'd get them off the path of robotnik's subordinates; this sonic also does not like being bored and anything would be interesting if he gets a break from having to deal with robotnik. not only that, he's gotta make up for tricking scratch and grounder into disappointment, too.
but s&g aren't going to ask sonic by themselves; if there's any it would be dufus they're gonna seek help from, as badniks are often not in good terms with each other, let alone no purpose built badnik is available. even better; dufus can provide them stage equipments by becoming the stage. dufus also is a bored man and would be willing to do anything as much as sonic.
dufus can definitely criticise s&g, but would talk about it in a rounder way. he doesn't want to disappoint them. but sonic knows better that s&g need to be conveyed things more directly from much longer experience dealing with them, and will chime in into the conversation. (relatively) harsher words will come out of sonic's mouth, and s&g will listen. while their obliviousness has often been their downfall, it's helping this time as they're listening to anything that's being told to them.
i think dufus is the only robot that is safe from repercussions from acting on his own free will. all other robots are either designed by robotnik or built with singular purpose without sentience in the universe. dufus' creator went mental and went south for the season and is unlikely to come back.
aosth had a few extremely potent characters that showed up exactly once. dufus must be one of them, along with sucker, dream meister, slimey, and katella. dufus must be living the rest of his life on relatively easy mode thanks to that, and would definitely be willing to spend his time in whatever way, which quite possibly would include helping other robots.
anyway the chain of thoughts lead to a conclusion:
dufus will make people kiss when they're being annoying.
sonic and shadow fighting is annoying.
dufus will go "make up and now kiss" on them.
repercussions are not a thing to worry about for him, since if he can jail sonic inside him, not getting a dent from triple spin, then he will not feel a thing from spindash.
since shadow does not want to accept that he can't apply damage to dufus, he considers bringing the end of the world again.
dufus doesn't seem to care. sonic has brought the end by his own volition at least once as far as he's concerned, and it turned out alright.