I didn’t really thought about that..
It just happens that I like brothers characters so much, when it’s the older and younger brother, when the older cares about the younger, worries, protects him, all that brotherly relationship bonding and etc. and there are very few of them in any medias, I still can’t find many of them..
The perfect example of such brother relationship for me is Sean and Daniel from the Life Is strange 2 (but the Daniel there is a total *oron, sorry for my language)
I love when there’s love between them, fluff and all that stuff and I like Sonic very much and wanted to make a lil bro for him thinking that it would be coold if he had one and seeing him getting nervous and worried about him and all that. I don’t know why, I always liked that.. And so that is how Monty was “inspired” and he had different designs before and names
And Tony.. That one I didn’t think much about, I just wanted Monty to have some friend like Sonic and Tails are and maybe something like “next generation” thing