>>51327815He'd be approx. 19.
The speculated additional 10 year time gap is absolute PokeTuber dogshit fanfiction where they pretend meta references to the 20th Anniversary in the PokéDex are more relevant than Mina/Red/Blue in LGPE, in which you explicitly see a child Mina, and Blue/Archer set up for their post-Kanto stories.
LGPE is the first damn time Game Freak literally EVER established continuity for future games within a Kanto title that wasn't just the tiniest Hoenn connection in the Sevii Islands, and the community chose to ignore it because it didn't match their retarded fan theory and played around with the Red's role in the story (as if remakes/alt versions havent always shifted roles and events without altering the entire timeline).
Timeskips in Pokémon have always been 1-3 years (usually solidly 2, and in LATER Gens, aligned to release dates) - The additional 10 year timeskip theory essentially makes the hard dev-confirmed canon of Gen 1/3 and 2/4 being aligned in the timeline insignificant, because they desire Gen 1 in particular pushed back to match the 1996 year even though it'd put Gen 4 happening in like 2000 which makes no bloody sense, and the additional years up til Gen 5 essentially got pulled out of peoples ass until it lined up with 20 years between Kanto and Unova - Even though Mina was explicitly put in LGPE to establish the smaller range of the timeline. Mina is only allowed to be a Trail Captain until she is about 19, and if you look at Red in Sun and Moon and see a 31 year old, you might just be retarded.
Caring about timeline bullshit is cringe i know, but the fact that the 20 year theory (that contradicts GF's own statements and established canon) became widespread accepted in the community will never not piss me off and I try to dispell it wherever I can.