You cannot catch Charcadet above lv. 35 in any game currently.
Instead, I've put the highest level that Charcadet can be obtained in the games it's available in.
In Scarlet & Violet
You can catch the highest level wild Charcadet at lv. 32 in these games. You can find lv. 28-32 Charcadet in West Province Area 3 (around Medali) in the forests.
Lv. 35 Charcadet can be found in 3-star Tera Raids, but are picked from a pool, and you cannot guarantee they show up.
This is the only way to catch >lv. 35 Charcadet in any game.
Source for this
In Legends ZA DLC
You can catch what are technically ~lv 120 Charcadet in Hyperspace Wild Zones, but they revert down to around level 20 when caught.
Source for this, along with my experience
