Ok im not sure if ppl are aware of this issue or has solved it already but as most of you know when you do the uno tag system in Ikemen you cant control your 2nd char when you tag after pressing control 3 . well i finally solved this an i was so excited i had to post this. Ok  so this is how you do it.

1Go to ssz folder
2:Then go to config
3: now scroll down to the controls and under it paste this

in.new[2].set(
  -1, (int)k_t::UP, (int)k_t::DOWN, (int)k_t::LEFT, (int)k_t::RIGHT,
  (int)k_t::a, (int)k_t::s, (int)k_t::d, (int)k_t::z, (int)k_t::x, (int)k_t::c,
  (int)k_t::RETURN);

now these are MY controlls u dont have to do them, copy an paste ur P1 controls the MAIN IMPORTANT thing is to put the "2" in the "in.new[2].set" i guess this is like player 3 because player 2 is [1] an thats pretty much how you have tag team in ikemen! enjoy!