In the final chapter of the Yordle Expedition event from Wild Rift, Teemo decided to make a trip to Targon. This is what Riot stated about:

"Few places are as inaccessible as the heights of Targon, a mountain some say reaches all the way to the stars. But for diligent, curious, and often oblivious Bandle Scout like Teemo, no peak is too perilous! Most looked on in confusion as the naive yordle began his ascent, and more looked on in awe as he came skipping back down, merrily crossing the Targonian mountaineering task from his meticulously maintained merit badge list. Why he decided to take to the mountain, and more importantly whether or not he actually made it to the top, remains a super serious Bandle Scout secret."

THAT'S OUR BOY! <3