What this record means
The record shows that “NINJA WARRIOR PLAYGROUND” is an abandoned service mark; the USPTO listed it as dead on September 12 2021 after the applicant, Kyle Van Fossen, failed to respond to an Office action, and no later renewal or reinstatement appears. The registration covered only class 041 services – providing obstacle‑course training gym facilities, play facilities, fitness facilities, strength‑training instruction, sports‑competition arrangements, gymnastics instruction and martial‑arts education – all tied to the first commercial use of August 1 2015. A similar name used for anything outside those education‑and‑entertainment services would be farther from the scope shown here, but the record does not give the owner control over every possible use of the words “Ninja,” “Warrior” or “Playground.” The prosecution history reflects a series of non‑final and final Office actions in 2016‑2021, ending in an abandonment notice, and there are no entries indicating oppositions, cancellations or court actions. I'd treat this as a moderate concern if you plan a mark that serves similar gym‑or‑martial‑arts‑related services.
Informational only - not legal advice.