First stage is a call with the recruiter. They describe the company, explain the process and talk you through benefits, salary expectations etc.
Second stage is a technical interview with Karat. This is a completely one-way process to gauge your technical aptitude, and to avoid wasting the time of the people you would be working with. As the interviewer does not work for Pokemon, there is no real questions you can ask. You can however ask how you did, and they will generally tell you. It's good in that sense as you get instant feedback.
Third stage is an interview with a hiring manager. This is where it went downhill for me. The manager had a very aggressive interview style. As a US company, they are looking for Silicon Valley work culture, and this clearly through me off.
Be prepared to answer `yes` to any questions about work/life balance, and then once you get the job then you can look up on UK law and how it prevents scenarios like they describe. The technical questions were the same as the Karat interview, and I felt he had not read my CV. The US has 'at-will' work, which means you can quit at a moments notice, and be fired at a moments notice. This means the employee traditionally has great power over workers, which is not the case in any European company.
Fourth stage would be another hiring manager. This is a very long process.
Typically if you end up working for a popular company like Facebook, Amazon, Google etc, you do end up having to make compromises for the experience. This is also the case with Pokemon, so just be aware. This could be a great job for someone at the start of their career, but in comparison to similar jobs on the UK market, many red flags were raised.
I did feed all this back to the recruitment team, but in the end did not get an offer. Hopefully this will be less of an issue going forward, but is something you should consider when applying for *any* US based companies.