If there's anyone Big Blue is a total fanboy of, it's that buff and burly dragon Dragaux. So upon coming across a mask that can turn the wearer into the mountainous, muscled hunk, he just had to get someone to wear it.
"Come on Bjorn, pleeeeeaase?" practically begged his chubby pal to put it on, just for a little bit, as he held out the mask.
"Jeez Tyran, ya never beg for anythin'..." Bjorn responded, grumbling somewhat at Tyran's almost desperate pleas. "Fine fine.." Bjorn muttered, slipping on the mask. In only a moment, Bjorn felt his body begin to shift and change. All that weight began to fade and turn into pure muscle that packed his body as it grew in height. Plush, snowy white fur became darker and much shorter before it shifted into protective dragonhide. A snug fitting singlet snapped itself around that new form as Bjorn finally gained the visage of the fearsomely fit Dragaux.
"Woah this feels.. different.." Bjorn raised up his new arms, curling his fingers over slightly. "and I've changed into other Digimon be-" he was cut off as Tyran giddily wrapped his arms around him.
"Ah Bjorn thanks so much! This is a dream come true!" Tyran squeezed his pal's solid frame.
"Yeah yeah, how does this come off exactly?"
"No idea! We'll figure it out after cuddles~" Tyran pressed against Bjorn and rubbed his cheek against those huge pecs.
"I.. rrfff... you'd better find a way to get this off" Bjorn grumbled. Seeing Tyran in such giddy delight, the newly transformed dragon just couldn't stay mad at the blue rex. Resting a hand on Tyran's back and slowly stroking over it, Bjorn resigned himself to being this daddy dragon for now. "After some cuddles then" he sighed softly as he laid back with Tyran, content with having the once proud rex now cuddled to his side, caressing those new abs of his.

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A YCH comic I got from  Twiphase3468

Bjorn Starkriss and Tyran Blau belong to  BigLovingWolf

Dragaux © Ring Fit Adventure/Nintendo