Cleaner Latios
Latios (M) @ Salac Berry
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 30 HP / 0 Atk
- Substitute
- Calm Mind
- Dragon Pulse
- Psyshock
The goal of this set is to setup Substitutes and Calm Minds until the Salac Berry activates. After that, it'll be able to outspeed and KO a couple of weakened opposing mons with relative ease and even some healthy would-be checks such as ScarfChomp and Knock Off Thundurus (at +1). Furthermore, Subtitute helps Latios by ignoring status inducing moves (Thundurus' Prankster T-Wave for example) and making it easier to reach Salac range (30 HP IV instead of 29 makes Latios' HP stat divisible by 4, which means only 3 Subs are needed to activate Salac Berry).
Of course, Latios will need Steel-types and Pursuit trappers such as Bisharp and ScarfTar gone before pulling off his trick. This is where Fighting-type partners such as Keldeo can come in handy by KOing those threats, paving the way for Latios. Fairies, especially Hyper Voice users (M-Gardevoir, M-Altaria, Sylveon, etc.), are also a problem due to their ability to hit through substitutes (and for being super effective against Latios). For these specific threats, it's nice to have a Steel-type partner such as [Mega] Scizor to easily KO these mons, making Latios' job way easier.
Many great sets out there! I hope this set is not total garbage (like my attempt with Gyara lol)!

Latios (M) @ Salac Berry
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 30 HP / 0 Atk
- Substitute
- Calm Mind
- Dragon Pulse
- Psyshock
The goal of this set is to setup Substitutes and Calm Minds until the Salac Berry activates. After that, it'll be able to outspeed and KO a couple of weakened opposing mons with relative ease and even some healthy would-be checks such as ScarfChomp and Knock Off Thundurus (at +1). Furthermore, Subtitute helps Latios by ignoring status inducing moves (Thundurus' Prankster T-Wave for example) and making it easier to reach Salac range (30 HP IV instead of 29 makes Latios' HP stat divisible by 4, which means only 3 Subs are needed to activate Salac Berry).
Of course, Latios will need Steel-types and Pursuit trappers such as Bisharp and ScarfTar gone before pulling off his trick. This is where Fighting-type partners such as Keldeo can come in handy by KOing those threats, paving the way for Latios. Fairies, especially Hyper Voice users (M-Gardevoir, M-Altaria, Sylveon, etc.), are also a problem due to their ability to hit through substitutes (and for being super effective against Latios). For these specific threats, it's nice to have a Steel-type partner such as [Mega] Scizor to easily KO these mons, making Latios' job way easier.
Many great sets out there! I hope this set is not total garbage (like my attempt with Gyara lol)!