Pokemon Season 11 - Episode 523 – Journey to the Unown

In Solaceon Town, Ash's group meets up with Dawn's old friend and rival Kenny and his new Pokémon, Breloom. Kenny tells them he is going to the Solaceon Ruins, a place of worship for the legendary Dialga and Palkia, so they tag along, only to get more than they bargained for when the Unown that live in the ruins become furious along with the appearance of the sinister Team Galactic. Dawn's Aipom evolves to Ambipom.

Pokemon Season 11 - Episode 522 – Luxray Vision

Ash encounter a young Officer Jenny named Marble and her Luxray. Luxray is unable to use its electric moves, so Ash & Co. set out to help it.

Pokemon Season 11 - Episode 521 – Nosing ‘Round the Mountain

Ash battles Alan, a trainer that wants his Nosepass to evolve into a Probopass, but it can only evolve if it levels up in Mt. Coronet. When it does, Team Rocket brainwashes it and now Ash & Co. have to get it back. 

Pokemon Season 11 - Episode 520 – Bibarel Gnaws Best!

Ash's group encounters a Pokémon Breeder working on the construction of a stone bridge. The woman is arguing with the bridge's designer because of their Pokémon assistant Bibarel's refusal to work. After the stone cutter returns, Bibarel begins to construct the bridge, with help from the Gang. 

Pokemon Season 11 - Episode 519 – The Keystone Pops!

After Ash's Buizel destroys the Hallowed Tower, a Spiritomb is unleashed and attacks Ash, Dawn, Brock and a nearby village. Then Jessie tells it that Ash is a descendant of the Aura Guardian that coincidentally has a Pikachu, that sealed it away. So Ash sets out to stop the Spiritomb and with Pikachu's help, they seal it away in the Hallowed Tower.