Right now there are few cards that can do this, there are the two well known Fang Pi Clang cards : lost hog and Kinjo as well as the colector lao, and i think there's also a La Junta colector, but that one is not really playable, as i have been playing fang pi for a long time i can tell you that this is a very powerfull ability but also with some weaknesses, such as all the damage reduction, stop bonus, or the stop ability for Kinjo, as well as the low power of this cards makes it sometimes hard to use that ability. Far more usefull is to fake a Kinjo or lost hog attack, by playing them with no pillz and then ko your opponent with other cards. This kind of strategy enables fast matches with reasonable battle points bonuses, which can lead to many tournament victories.
Yup, General Cr is more than playable, a 7/8 with stop ability and 1 round ko..... am i too wrong if i say that's propably one of the top 3 best cards ever...? i didn't got the chance to see him, and it was not for sale so i couldn't see his stats...... the card i was refering to was Flavio Cr, which is an 1/8.