Well, I don't know anything about you, but I was definitely not a piranha factory that could be uncovered as a new DLC fighter for Super Smash Brothers Ultimate, but that happened!
Still, Piranha plants can only be used as free fighters, so there is no time for shock and respect. This guide explains exactly what you need to claim it yourself.
How to get a piranha plant as a free fighter for Super Smash Bros. Ultimate:
Step 1-own a Nintendo Switch and have a Nintendo account
If you do not already have a Nintendo account, click here to create one.
Step 2-Purchase and register Super Smash Bros. Ultimate. There are two ways to do this.
Digital purchase: Purchase Super Smash Bros. Ultimate at Nintendo Switch eShop or Nintendo.com before 11:59 pm (Pacific time) on January 31, 2019
When you purchase digitally, Super Smash Bros. Ultimate is automatically registered to your Nintendo account
Physical purchase: However, this is a retail version of the game and will be completed with a toy car by 11:59 pm (PT) on January 31, 2019
Game carts must be manually registered in your account. To register, go to the game you want to redeem in the switch [Home] menu and press the [+] button. From there, go to the “My Nintendo Rewards Program” and click on it. Next, click Collect Points (game card version only), select an account to register the game and collect Gold Points.
Step 3-After registration, please note the email address of your My Nintendo account.
The download code for Piranha Plant DLC will be sent within 48 hours after registration.
Step 4-Use the code
Piranha Plant DLC code download will expire at 23:59 PT on June 30, 2019
Step 5-Sit down and relax after steps 1 through 4. The Piranha plant is not a starter fighter and should be included in the 2019 team.
Given the fact that the piranha plant Amiibo will be released on February 15, 2019, there is a good chance that the piranha plant will be added in February.
If you do not perform any of the above and receive the Piranha Factory as a free fighter, you will be given the opportunity to purchase the Piranha Factory as a paid DLC that is completely separate from your Filers Pass content.
Price details will be added as soon as the Piranha plant is available. In the meantime, here are two videos on how herbs work.