This team is weak to Terrakion, rain teams, Rotom-W and opposing M-Kangs.
Life Orb or Choice items are the best items on Mamoswine, while Thundy can't win against Scarf Land-T even with a Sitrus Berry because Rock Slide is a 2HKO. If you put 52 EV in Defence instead of in SpA, Adamant Land-T Rock Slide is always a 3HKO after Sitrus Berry recovery (and you can handle physical hits better in general). The rest is standard.. i don't know if Talonflame can be a good call these days, maybe Tailwind + Snarl Suicune gives you better coverage and support (since you already have an offensive team) but you won't have a W-o-W in your team to burn physical attackers. Mmm.. i think you would still need an Intimidate to support your Sylveon and Thundurus in particular.
Life Orb or Choice items are the best items on Mamoswine, while Thundy can't win against Scarf Land-T even with a Sitrus Berry because Rock Slide is a 2HKO. If you put 52 EV in Defence instead of in SpA, Adamant Land-T Rock Slide is always a 3HKO after Sitrus Berry recovery (and you can handle physical hits better in general). The rest is standard.. i don't know if Talonflame can be a good call these days, maybe Tailwind + Snarl Suicune gives you better coverage and support (since you already have an offensive team) but you won't have a W-o-W in your team to burn physical attackers. Mmm.. i think you would still need an Intimidate to support your Sylveon and Thundurus in particular.