The picture has been sent on Discord.
It turned out that hp2 was Emiliohp on Registry, therefore:
I will need to add a -10 penalty for Team Rocket, as mentioned in Rule 3.5.d.: Players must use a Mii name which makes them easily recognizable as their alias on the MKCentral registry. Failure to do so will result in a -10 (-7 in a 5v5) points penalty for the match.
The score is now corrected to:
Team Rocket 463 - 511 Atenea Gamers
Match is now approved.