Will Kommo-o's new Z-move Clangorous Soulblaze give it a ticket to VGC 2018 or will the use of Tapus and the scary moon blasts keep it away?
The VGC18 stats are finally out! I can answer this question! Kommo-O was used on about 7% of VGC teams last month, implying that it was pretty viable. Additionally, it was ranked B in Smogon's viability rankings. This is Smogon's description of Kommo-O's current viability.
B rank Reserved for Pokemon who are great in the VGC metagame. These Pokemon have more notable flaws than of those above it that affects how they function in the tier. Their positive traits still outshine their negatives, but they require a bit more team support to bring out their full potential. Their niches are often slightly smaller than those that are in A and S rank, which leads them to face some competition for a teamslot.
source source