i need help with special movement

...things and i couldn't help noticing that some ppl can dance and do weird stuff so i asked someone i met there shes japanese she told me about "special movement" she said you can buy them in a place i really can't remember its name tho so have no idea were is it then i asked someone else he told me you can buyem' from cards?? soo i really wonna know were i can buy them from soo .. HELP ME PLZ T_T