Has someone reserved Petilil yet? If not, then I will.
Name: Petilil
Availability: Can be found immediately after the first trial in Moon version.
Stats: When it starts out as a Petilil, its starts are pretty mediocre outside of its Special Attack. But Lilligant has a very good speed stat for Alola and very high special attack.
Typing: Grass is a solid typing for taking out the Rock, Ground, and Water types throughout the game. However, Poison, Flying, and Bug types are rather common, so it's chances of staying in are limited.
Movepool: Very very shallow. Offensively, it only gets access to Grass-type moves, Normal-type moves, Hidden Power, and Dream Eater. Support wise, however, it gets all that it really needs to. Sleep Powder in particular is great for getting free turns, especially as a Lilligant. Sadly, though, Quiver Dance is at level 28, which is hampered by the Sun Stone not being available till the third island. X-Items can somewhat go pass this, however. Petal Dance and Giga Drain can be enough to suffice though due to their sheer power, especially when it has evolved.
Major Battles: Gets hit too hard to be of much use against Hala, though it can potentially cripple a Pokemon or two. Cakewalks Totem Wishiwashi, but falls very flat against Salazzle, Mimikyuu, and Lurantis. Vikavolt is pretty iffy, as while it resists Electric it can't do much back. Kommo-O hits very hard against it, but Lilligant outspeeds it and puts it to sleep, potentially utilizing Dream Eater as well. Gladion is a toss-up, as it handles Water-type Silvally and Type:Null decently but fails against anything else. Guzma is a no-go. Lusamine is a pretty OK matchup outside of Mismagius' Mystical Fire. Against the Elite Four, it does pretty okay against Hala as it can use Hariyama as sleep and set-up fodder (though Ice Hammer from Crabominable OHKO's you). Olivia is a easy win (though Probopass can be annoying with Thunder Wave and its great special bulk), and Acerola is OK outside of Drifblim and Froslass. Don't even try using it against Kahili though. Kukui is a very iffy matchup. It easily KOs Lycanroc and does well against Primarina, but struggles against everything else. Hau is a good matchup, though it should be careful around his Fire-types and Rowlett/Datrix/Decidueye.
Additional Comments: Own Tempo is the preferred ability to cooperate with Petal Dance, its main selling point. The late availability of the Sun Stone really hampers its viability, as well as its weak movepool and defensive typing. However, its incredibly fast and strong, and Sleep Powder is a huge niche over its Grass-type competition.
Name: Petilil
Availability: Can be found immediately after the first trial in Moon version.
Stats: When it starts out as a Petilil, its starts are pretty mediocre outside of its Special Attack. But Lilligant has a very good speed stat for Alola and very high special attack.
Typing: Grass is a solid typing for taking out the Rock, Ground, and Water types throughout the game. However, Poison, Flying, and Bug types are rather common, so it's chances of staying in are limited.
Movepool: Very very shallow. Offensively, it only gets access to Grass-type moves, Normal-type moves, Hidden Power, and Dream Eater. Support wise, however, it gets all that it really needs to. Sleep Powder in particular is great for getting free turns, especially as a Lilligant. Sadly, though, Quiver Dance is at level 28, which is hampered by the Sun Stone not being available till the third island. X-Items can somewhat go pass this, however. Petal Dance and Giga Drain can be enough to suffice though due to their sheer power, especially when it has evolved.
Major Battles: Gets hit too hard to be of much use against Hala, though it can potentially cripple a Pokemon or two. Cakewalks Totem Wishiwashi, but falls very flat against Salazzle, Mimikyuu, and Lurantis. Vikavolt is pretty iffy, as while it resists Electric it can't do much back. Kommo-O hits very hard against it, but Lilligant outspeeds it and puts it to sleep, potentially utilizing Dream Eater as well. Gladion is a toss-up, as it handles Water-type Silvally and Type:Null decently but fails against anything else. Guzma is a no-go. Lusamine is a pretty OK matchup outside of Mismagius' Mystical Fire. Against the Elite Four, it does pretty okay against Hala as it can use Hariyama as sleep and set-up fodder (though Ice Hammer from Crabominable OHKO's you). Olivia is a easy win (though Probopass can be annoying with Thunder Wave and its great special bulk), and Acerola is OK outside of Drifblim and Froslass. Don't even try using it against Kahili though. Kukui is a very iffy matchup. It easily KOs Lycanroc and does well against Primarina, but struggles against everything else. Hau is a good matchup, though it should be careful around his Fire-types and Rowlett/Datrix/Decidueye.
Additional Comments: Own Tempo is the preferred ability to cooperate with Petal Dance, its main selling point. The late availability of the Sun Stone really hampers its viability, as well as its weak movepool and defensive typing. However, its incredibly fast and strong, and Sleep Powder is a huge niche over its Grass-type competition.