You could give the young colt’s name Skull Candy & the other one Green Sandal.

@Background Pony #E40D: “Background ponies do NOT have continuity.”  
YES! Someone gets it! This is why Bon Bon has had, what, 6 different voices by now, and why she was in both Ponyville and Dodge Junction in “The Last Roundup”, and why the audience in this shot seems to have an unusually high concentration of identical twins:  
 
Among many, many, many other inconsistencies.

@Background is Best Pony  

 
Background ponies do NOT have continuity. Hence how in one episode two ponies seem to be great friends and in the next they hate each other.
 
This is also why a few normal ponies (including Berry Punch) appear in the crystal empire in the episodes in which only Celestia, Luna, Cadence, Shining, Spike, and the Mane Six are suppose to know about it.
 
Or why some of the Sisterhooves social “big sisters” are watching the race as well as partecipating in it.
 
https://derpiboo.ru/844721?scope=scpe4ccb53b5ab1396c908865797b19052e679b8f502  
Or how in this image there is: Derpy and redhead Derpy, Colgate and earth pony Colgate, earth pony Lyra, two Shoeshines, and two Cloud Kicker’s.

Maybe, Orange Stripes?

@Background Pony #D0A7  
No, you’re thinking of a different colt.

@Background Pony #AD39  
No, what I mean is some of the 5-year-olds in Sweetie Belle Toils appeared in the exact same form in IM, and even if he didn’t, it wouldn’t make sense for this one guy to have continuity while the rest of his friends didn’t.

@Background is Best Pony  
But he didn’t appear in IM. And they’re have same color scheme

for the lolz, I want to call him
 
‘Hubble Bubble’

@Background Pony #D8AC
 
Heretic detected.

Are you sure that these two are the same pony? The rest of the five-year olds appeared in the same design in Inspiration Manifestation (terrible continuity)

Because not everyone feels the need to compulsively name every single BG pony that appears for 2 seconds?

Papaya?

Short bus

hes named after Fry from futureama.

Helmet Hair?

His name is Gorbo Parxinderf.