Boxer Shannon Briggs -- FLIES TO GERMANY ... To Taunt Wladimir Klitschko

He's trolled him on land. He's trolled him at sea. And now boxer Shannon Briggs has flown all the way to GERMANY to taunt Wladimir Klitschko ... and it's all on video.

Briggs has been calling out Klitschko for MONTHS -- trying to get the boxer to fight him in the ring. He's already confronted the boxer in a restaurant, in various boxing gyms and even while Wlad was paddleboarding in Florida.

Now, Shannon has landed in Hamburg -- where Wladimir is set to fight Kubrat Pulev in the morning -- so he could continue his campaign of verbal terror.

It's pretty funny ... Briggs not only showed up to a training center where he knew Wlad would be ... he also showed up to a German mall for Klitschko's weigh in and taunted him there too.

So far, Wlad has not agreed to a fight -- but ya gotta think it's just a matter of time.