The details for the Not Just Pikachu - The Pikachu Outbreak-chu! 2017 (ピカチュウだけじゃない ピカチュウ大量発生チュウ！) event have been announced by the official Japanese Pokémon website. The event will take place from August 9th, 2017 until August 15th, 2017 in the Yokohama Minato Mirai area!

1. Pikachu · Carnival · Parade

The Pikachu · Carnival · Parade will be held starting at 16:00 on Monday, August 14th, 2017. Japan Main Street will be pure yellow!? It's an hour long to enjoy with over 100 Pikachu.

Date and time: Monday, August 14, 2017 - Starting at 16:00 ~ (about 1 hour)
Venue: Japan Main Street (日本大通り) (Elephant's Nose Park (Departure) - Yokohama Park (Finish))
Notes: Standing room only. Please do not leave space for leisure seats and luggage, etc. The contents of the show are subject to change without notice due to weather or other reasons.

2. Goes Around the Sea! Flies in the sky!

A boat in the sea and an airship in the sky that Pikachu rides in will be in the Yokohama Minato Mirai area! If you see it, take a picture and share it!

Greeting Pikachu on the ship
Date and time: Wednesday, August 9th, 2017 through Tuesday, August 15th at 11:00, 12:30, 15:00, 16:30
Monday, August 14th, 2017 it will be held only at 11:00, 12:30.
Venue: Sailing Pikachu - Near the Nippon Maru Sailing Boat, Nippon Maru Memorial Park to Cup Noodle Museum Park

Airship Pikachu
Date and time: Wednesday, August 9th, 2017 through Tuesday, August 15th at 10:00, 12:00, 15:00
Venue: Yokohama Minato Mirai area

3. Soaking Splash Show "Water Carnival"

Splash show which was very popular last year and has powered up and will reappear! Approximately 2 tons of water will be launched from a Water Cannon and the show is highlighted by the Pikachu performance where everyone will enjoy it and be soaked!

Date and time: Wednesday, August 9th, 2017 through Tuesday, August 15th at 12:00, 14:,00, 16:00
Venue: Yokohama Red Brick House
Notes: This show will be a "soaking event" using water. Depending on where you are going to be, a lot of water will be expelled. Please make sure that your mobile phone and electronic equipment will not get wet. In addition, we will not be held responsible for any malfunctions. Yokohama Red Brick House toilets and surrounding facilities are prohibited, so if you need a place to change clothes, please contact the staff the same day.

4. Pikachu Walk

20 Pikachu will be walking together!

Date and time: Wednesday, August 9th, 2017 through Tuesday, August 15th
Venue: Queen's Square Yokohama (Departure) - between Grand Mall Parks (End)
Facility site: http://qsy-tqc.jp/

Pokémon GO PARK

Pokémon GO PARK will be in the Minato Mirai area where players can enjoy the game even more! Details of the event will be announced at a later date.

Date and time: Wednesday, August 9th, 2017 through Tuesday, August 15th at 10:00 to 18:00
Venue: Cup Noodle Museum Park and Red Brick Park

Pokémon GO STADIUM

A big event centered around Pokémon GO to be held at Yokohama Stadium. Get together with your friends and have summer fun! Pokémon GO STADIUM is a Pokémon GO event that will be held at Yokohama Stadium on Monday, August 14th. Have a blast together with everyone playing Pokémon GO!

How to Join Pokémon GO STADIUM
Those chosen by lottery may participate in this event. Please read the "Event Information" below before you enter. A "Notice of Selection" email will be sent at the end of July only to those who have been chosen. Detailed information for participating in this event will also be sent in this email. The event is scheduled to run about once every 15 minutes, with tickets valid for one program only.

Event Details:
Entry deadline: Monday, July 24th, 2017 at 10:00 AM
Date and Time: Monday, August 14th, 2017 from 18:00 - 21:00
Venue: Yokohama Stadium
Participation Fee: Free of Charge
Cancellations: There may be cancellations in the event of bad weather. If so, we will make the announcement on the "Pokémon Official Site" and "Pikachu Outbreak!" official websites.

Pokémon GO STADIUM - Participation Notes

• Please register your email address and Pokémon Go trainer nickname for your entry.
• Limited to one entry per person.
• Participation in event is limited to once per Pokémon GO account.
• You may apply using a different email than the one used for your Pokémon GO account.
• Please adjust your settings to receive emails from "@pdc.pokemon.jp".
• We will send the "Notice of Selection" to the registered email address to those who have been selected at the end of July. One "Notice of Selection" email is good for entry for up to 4 people. Among these 4 people, even those who do not play Pokémon GO are permitted to join.
• You may not designate an entry time when applying.
• Transfer or resale of the participation rights to a third party is strictly prohibited.
• Please check device compatibility for Pokémon GO before participating.
• In order to participate in this event, you will need a smartphone that can play Pokémon GO as well as a Pokémon GO account with a Trainer Level of 5 or higher.
• High-heeled shoes are strictly prohibited at the venue.
• Food and drinks other than water are not allowed to be brought into the venue or consumed in any part of the stadium.

YouTube Commercial - Not Just Pikachu - The Pikachu Outbreak-chu! 2017

Source: http://www.pokemon.co.jp/ex/pika_event/