I've always assumed that what the legos are supposed to represent is Blue building up his new gym to replace Giovanni's old gym, but due to general time and cartridge-space constraints with Kanto they didn't really flesh out the concept beyond... well, legos. That's speculation, of course, but otherwise I have no idea why they would have gone for green legos.
Unrelated, but I've been replaying X and Y lately and it's led to me thinking about ZA: I'm very curious to see if we'll get any resolution, or at least any further continuation, to the ghost girl in Lumiose or the writing on the wall in the train station. I've always assumed that these were meant to be fun easter eggs more than serious hints at anything, but they're certainly memorable, and I'm curious to see if GF follows up on them at all.
Unrelated, but I've been replaying X and Y lately and it's led to me thinking about ZA: I'm very curious to see if we'll get any resolution, or at least any further continuation, to the ghost girl in Lumiose or the writing on the wall in the train station. I've always assumed that these were meant to be fun easter eggs more than serious hints at anything, but they're certainly memorable, and I'm curious to see if GF follows up on them at all.