EASA Part-FCL references as requested:
FCL.520.A ATPL(A) — Skill test
Applicants for an ATPL(A) shall pass a skill test in accordance with Appendix 9 to this Part to demonstrate the ability to perform, as PIC of a multi-pilot aeroplane under IFR, the relevant procedures and manoeuvres with the competency appropriate to the privileges granted.
The skill test shall be taken in the aeroplane or an adequately qualified FFS representing the same type.
FCL.010 Definitions
‘Multi-pilot aircraft’:
for aeroplanes, it means aeroplanes certificated for operation with a minimum crew of at least two pilots
The fact that a single-pilot aeroplane is operated by two pilots does not make it 'multi-pilot' in the context of Part-FCL.
As
tescoapp points out, the 500 hours experience requirement for the issue of an ATPL(A) is in multi-pilot operations and not, necessarily, in multi-pilot aeroplanes and so that may be obtained in the Phenom.