Pedzisa mutsara unotevera: Pamatanho evechidiki vechidiki, Kulboka akamiririra Lithuania padanho renyika dzakawanda kakawanda, kusanganisira pa2014 FIBA Europe Under-16 Championship uye 2015 FIBA Europe Under-18 Championship. Akawana timu-yakakwira 15.7 mapoinzi pamutambo mu2016 FIBA Europe Under-18 Championship, munzira yekuenda kumenduru yesirivheri. Akakwikwidzawo nokuda kweLithuania mu
2017 FIBA Under-19 Basketball World Cup, avhareji yechikwata-yakakwira 13.7 mapoinzi pamakwikwi. Musi waFebruary 26, 2018, Kulboka akatanga kuve nhengo yechikwata chevakuru veLithuania, nekukora mapoinzi mapfumbamwe, akabata mashanu rebounds uye achipa rubatsiro rwevaviri, uye akabatsira kupwanya timu yenyika yeKosovo, nechikamu che106<unk>50, panguva ye2019 FIBA Basketball World Cup kukodzera.