I want to know wich migration consultant is legal...

I would like to inform you that if you mean immigration to malta then there is no immigration program as Canada, Australia or New Zealand. Therefore, you have to get entry visa to malta then residence permit.
As for how to get the visa, it is included in the following cases:
1. Tourist visa: in such case it is related to the duration mentioned in the visa.
2. Employment visa: meaning to get a job there, therefore the visa and residence will be issued for you later as a worker.
3. Investment visa: if you have enough money to invest in there, then you can obtain the residence.
4. Reunion: meaning to get an invitation from one of you relatives such as your wife, if she is from there.
5. Visit visa: meaning to obtain an invitation to visit your relatives in there, and you are restricted in a particular duration for the visit.
6. Student visa: after obtaining acceptance or agreement by one of the universities there.
7. Asylum: which requires being inside that country to obtain the refuge.
In regard to visa application attach the following documents:
1. A copy of your valid passport for at least six months.
2. Personal photo as the passport photos.
3. A bank statement to guarantee the expenses of residence duration there.
4. Hotel Reservations “ ticket”
5. Air tickets “ round trip “
6. Health Insurance.
7. A certificate of Good Conduct.
8. Provide you valid residence for at least 3 months.
9. Provide the employer NOC.
10. Pay the fees and wait for the reply whether you are accepted or not.