It is revealed that Emerald Town has a Lowe's Home Improvement Warehouse, an Arby's restaurant and possibly a McDonalds restaurant.
Sir Brass is a completely original character, not having appeared in any Sonic media.
When Sonic is about to run in Silver's forcefield, Sonic's eyes flash blue. This might be a possible reference to the Sonic the Hedgehog films, where Sonic's eyes can also turn blue in a powerful state.
The emblem in Emerald Town 200 years later is a clear reference to the emblem seen in multiple Sonic games.
This episode could possibly be the series finale, as LJ's videos are continuously being marked as "made for kids" by YouTube.