Thank you for translating! Of course, it's only interesting if you played R/B/G/Y, FireRed or LifeGreen. So instead of Leaf, there could be Red, too.

I wonder, is "Ryoko" actually moar liek "Lea-ko" or similar, a nickname for "Leaf"? *adds check_translation*

Way to play on the boy's guilt/possible crush...

リョ = Ryo
ク = ku

I don't understand why it was used, but that's what it is...
(the name the author chose in the game perhaps?)

Absolutely love that his sister says "Same as ever" as if it's a common occurrence for this scene to play out for her.