If you’re in the UK, own a 3DS and have Mario Tennis Open you are in luck. Nintendo UK released a trailer promoting their Yoshi Chase event that has 3DS owners tracking down QR codes that unlock different colored Yoshis, each with their owns strengths, that are usable in Mario Tennis Open.
Various means of distribution will , the first is Black Yoshi which will be available across 30 Asda stores between Friday the 25 and Saturday the 26 of May from 9:30 am to 5:30 pm.
Participating stores include: Minworth Supercentre, Tamworth Supercentre, Patchway Supercentre, Cardiff Supercentre, Queensferry Supercentre, Ellesmere Port Supercentre, Coventry Supercentre, Derby Supercentre, Hessle Great Bridge Supercentre, Govan Livingston Supercentre (SOL), Huyton Supercentre, Pudsey Supercentre, Eastlands Supercentre, Trafford Park Supercentre, Gravesend, Milton Keynes Supercentre, Gateshead, West Bridgford, Havant Supercentre (SOL), Dagenham, Cortonwood Living, Haydon Supercentre (SOL), Eastleigh Supercentre, Eastgate Supercentre, Lower Earley, Watford Supercentre, Wigan Supercentre, Leicester Fosse Park.
(Via Nintendo Universe)